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51d62f2f2c
Saving the regulatory domain while setting custom regulatory domain
was done while accessing a RCU protected pointer but without any
protection.
Fix this by using RTNL while accessing the pointer.
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Reported-by: syzbot+27771d4abcd9b7a1f5d3@syzkaller.appspotmail.com
Reported-by: syzbot+db4035751c56c0079282@syzkaller.appspotmail.com
Reported-by: Hans de Goede <hdegoede@redhat.com>
Fixes: beee246951 ("cfg80211: Save the regulatory domain when setting custom regulatory")
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210105165657.613e9a876829.Ia38d27dbebea28bf9c56d70691d243186ede70e7@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
4290 lines
111 KiB
C
4290 lines
111 KiB
C
/*
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* Copyright 2002-2005, Instant802 Networks, Inc.
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* Copyright 2005-2006, Devicescape Software, Inc.
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* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
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* Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
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* Copyright 2013-2014 Intel Mobile Communications GmbH
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* Copyright 2017 Intel Deutschland GmbH
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* Copyright (C) 2018 - 2021 Intel Corporation
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/**
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* DOC: Wireless regulatory infrastructure
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*
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* The usual implementation is for a driver to read a device EEPROM to
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* determine which regulatory domain it should be operating under, then
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* looking up the allowable channels in a driver-local table and finally
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* registering those channels in the wiphy structure.
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*
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* Another set of compliance enforcement is for drivers to use their
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* own compliance limits which can be stored on the EEPROM. The host
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* driver or firmware may ensure these are used.
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*
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* In addition to all this we provide an extra layer of regulatory
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* conformance. For drivers which do not have any regulatory
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* information CRDA provides the complete regulatory solution.
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* For others it provides a community effort on further restrictions
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* to enhance compliance.
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*
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* Note: When number of rules --> infinity we will not be able to
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* index on alpha2 any more, instead we'll probably have to
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* rely on some SHA1 checksum of the regdomain for example.
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/kernel.h>
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#include <linux/export.h>
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#include <linux/slab.h>
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#include <linux/list.h>
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#include <linux/ctype.h>
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#include <linux/nl80211.h>
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#include <linux/platform_device.h>
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#include <linux/verification.h>
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#include <linux/moduleparam.h>
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#include <linux/firmware.h>
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#include <net/cfg80211.h>
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#include "core.h"
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#include "reg.h"
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#include "rdev-ops.h"
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#include "nl80211.h"
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/*
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* Grace period we give before making sure all current interfaces reside on
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* channels allowed by the current regulatory domain.
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*/
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#define REG_ENFORCE_GRACE_MS 60000
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/**
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* enum reg_request_treatment - regulatory request treatment
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*
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* @REG_REQ_OK: continue processing the regulatory request
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* @REG_REQ_IGNORE: ignore the regulatory request
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* @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
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* be intersected with the current one.
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* @REG_REQ_ALREADY_SET: the regulatory request will not change the current
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* regulatory settings, and no further processing is required.
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*/
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enum reg_request_treatment {
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REG_REQ_OK,
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REG_REQ_IGNORE,
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REG_REQ_INTERSECT,
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REG_REQ_ALREADY_SET,
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};
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static struct regulatory_request core_request_world = {
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.initiator = NL80211_REGDOM_SET_BY_CORE,
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.alpha2[0] = '0',
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.alpha2[1] = '0',
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.intersect = false,
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.processed = true,
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.country_ie_env = ENVIRON_ANY,
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};
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/*
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* Receipt of information from last regulatory request,
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* protected by RTNL (and can be accessed with RCU protection)
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*/
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static struct regulatory_request __rcu *last_request =
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(void __force __rcu *)&core_request_world;
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/* To trigger userspace events and load firmware */
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static struct platform_device *reg_pdev;
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/*
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* Central wireless core regulatory domains, we only need two,
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* the current one and a world regulatory domain in case we have no
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* information to give us an alpha2.
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* (protected by RTNL, can be read under RCU)
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*/
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const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
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/*
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* Number of devices that registered to the core
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* that support cellular base station regulatory hints
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* (protected by RTNL)
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*/
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static int reg_num_devs_support_basehint;
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/*
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* State variable indicating if the platform on which the devices
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* are attached is operating in an indoor environment. The state variable
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* is relevant for all registered devices.
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*/
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static bool reg_is_indoor;
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static spinlock_t reg_indoor_lock;
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/* Used to track the userspace process controlling the indoor setting */
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static u32 reg_is_indoor_portid;
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static void restore_regulatory_settings(bool reset_user, bool cached);
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static void print_regdomain(const struct ieee80211_regdomain *rd);
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static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
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{
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return rcu_dereference_rtnl(cfg80211_regdomain);
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}
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/*
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* Returns the regulatory domain associated with the wiphy.
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*
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* Requires either RTNL or RCU protection
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*/
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const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
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{
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return rcu_dereference_rtnl(wiphy->regd);
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}
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static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
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{
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switch (dfs_region) {
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case NL80211_DFS_UNSET:
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return "unset";
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case NL80211_DFS_FCC:
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return "FCC";
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case NL80211_DFS_ETSI:
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return "ETSI";
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case NL80211_DFS_JP:
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return "JP";
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}
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return "Unknown";
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}
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enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy)
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{
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const struct ieee80211_regdomain *regd = NULL;
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const struct ieee80211_regdomain *wiphy_regd = NULL;
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regd = get_cfg80211_regdom();
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if (!wiphy)
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goto out;
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wiphy_regd = get_wiphy_regdom(wiphy);
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if (!wiphy_regd)
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goto out;
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if (wiphy_regd->dfs_region == regd->dfs_region)
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goto out;
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pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n",
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dev_name(&wiphy->dev),
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reg_dfs_region_str(wiphy_regd->dfs_region),
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reg_dfs_region_str(regd->dfs_region));
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out:
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return regd->dfs_region;
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}
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static void rcu_free_regdom(const struct ieee80211_regdomain *r)
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{
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if (!r)
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return;
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kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
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}
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static struct regulatory_request *get_last_request(void)
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{
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return rcu_dereference_rtnl(last_request);
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}
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/* Used to queue up regulatory hints */
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static LIST_HEAD(reg_requests_list);
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static spinlock_t reg_requests_lock;
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/* Used to queue up beacon hints for review */
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static LIST_HEAD(reg_pending_beacons);
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static spinlock_t reg_pending_beacons_lock;
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/* Used to keep track of processed beacon hints */
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static LIST_HEAD(reg_beacon_list);
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struct reg_beacon {
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struct list_head list;
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struct ieee80211_channel chan;
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};
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static void reg_check_chans_work(struct work_struct *work);
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static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work);
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static void reg_todo(struct work_struct *work);
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static DECLARE_WORK(reg_work, reg_todo);
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/* We keep a static world regulatory domain in case of the absence of CRDA */
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static const struct ieee80211_regdomain world_regdom = {
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.n_reg_rules = 8,
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.alpha2 = "00",
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.reg_rules = {
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/* IEEE 802.11b/g, channels 1..11 */
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REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
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/* IEEE 802.11b/g, channels 12..13. */
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REG_RULE(2467-10, 2472+10, 20, 6, 20,
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NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW),
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/* IEEE 802.11 channel 14 - Only JP enables
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* this and for 802.11b only */
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REG_RULE(2484-10, 2484+10, 20, 6, 20,
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NL80211_RRF_NO_IR |
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NL80211_RRF_NO_OFDM),
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/* IEEE 802.11a, channel 36..48 */
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REG_RULE(5180-10, 5240+10, 80, 6, 20,
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NL80211_RRF_NO_IR |
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NL80211_RRF_AUTO_BW),
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/* IEEE 802.11a, channel 52..64 - DFS required */
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REG_RULE(5260-10, 5320+10, 80, 6, 20,
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NL80211_RRF_NO_IR |
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NL80211_RRF_AUTO_BW |
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NL80211_RRF_DFS),
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/* IEEE 802.11a, channel 100..144 - DFS required */
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REG_RULE(5500-10, 5720+10, 160, 6, 20,
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NL80211_RRF_NO_IR |
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NL80211_RRF_DFS),
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/* IEEE 802.11a, channel 149..165 */
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REG_RULE(5745-10, 5825+10, 80, 6, 20,
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NL80211_RRF_NO_IR),
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/* IEEE 802.11ad (60GHz), channels 1..3 */
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REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
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}
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};
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/* protected by RTNL */
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static const struct ieee80211_regdomain *cfg80211_world_regdom =
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&world_regdom;
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static char *ieee80211_regdom = "00";
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static char user_alpha2[2];
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static const struct ieee80211_regdomain *cfg80211_user_regdom;
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module_param(ieee80211_regdom, charp, 0444);
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MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
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static void reg_free_request(struct regulatory_request *request)
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{
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if (request == &core_request_world)
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return;
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if (request != get_last_request())
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kfree(request);
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}
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static void reg_free_last_request(void)
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{
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struct regulatory_request *lr = get_last_request();
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if (lr != &core_request_world && lr)
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kfree_rcu(lr, rcu_head);
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}
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static void reg_update_last_request(struct regulatory_request *request)
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{
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struct regulatory_request *lr;
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lr = get_last_request();
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if (lr == request)
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return;
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reg_free_last_request();
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rcu_assign_pointer(last_request, request);
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}
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static void reset_regdomains(bool full_reset,
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const struct ieee80211_regdomain *new_regdom)
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{
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const struct ieee80211_regdomain *r;
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ASSERT_RTNL();
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r = get_cfg80211_regdom();
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/* avoid freeing static information or freeing something twice */
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if (r == cfg80211_world_regdom)
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r = NULL;
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if (cfg80211_world_regdom == &world_regdom)
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cfg80211_world_regdom = NULL;
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if (r == &world_regdom)
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r = NULL;
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rcu_free_regdom(r);
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rcu_free_regdom(cfg80211_world_regdom);
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cfg80211_world_regdom = &world_regdom;
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rcu_assign_pointer(cfg80211_regdomain, new_regdom);
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if (!full_reset)
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return;
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reg_update_last_request(&core_request_world);
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}
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/*
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* Dynamic world regulatory domain requested by the wireless
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* core upon initialization
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*/
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static void update_world_regdomain(const struct ieee80211_regdomain *rd)
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{
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struct regulatory_request *lr;
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lr = get_last_request();
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WARN_ON(!lr);
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reset_regdomains(false, rd);
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cfg80211_world_regdom = rd;
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}
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bool is_world_regdom(const char *alpha2)
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{
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if (!alpha2)
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return false;
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return alpha2[0] == '0' && alpha2[1] == '0';
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}
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static bool is_alpha2_set(const char *alpha2)
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{
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if (!alpha2)
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return false;
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return alpha2[0] && alpha2[1];
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}
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static bool is_unknown_alpha2(const char *alpha2)
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{
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if (!alpha2)
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return false;
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/*
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* Special case where regulatory domain was built by driver
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* but a specific alpha2 cannot be determined
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*/
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return alpha2[0] == '9' && alpha2[1] == '9';
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}
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static bool is_intersected_alpha2(const char *alpha2)
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{
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if (!alpha2)
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return false;
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/*
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* Special case where regulatory domain is the
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* result of an intersection between two regulatory domain
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* structures
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*/
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return alpha2[0] == '9' && alpha2[1] == '8';
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}
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static bool is_an_alpha2(const char *alpha2)
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{
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if (!alpha2)
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return false;
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return isalpha(alpha2[0]) && isalpha(alpha2[1]);
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}
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|
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static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
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{
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if (!alpha2_x || !alpha2_y)
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return false;
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return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
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}
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static bool regdom_changes(const char *alpha2)
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{
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const struct ieee80211_regdomain *r = get_cfg80211_regdom();
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if (!r)
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return true;
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return !alpha2_equal(r->alpha2, alpha2);
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}
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|
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/*
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* The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
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* you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
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* has ever been issued.
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*/
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static bool is_user_regdom_saved(void)
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{
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if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
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return false;
|
|
|
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/* This would indicate a mistake on the design */
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if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
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"Unexpected user alpha2: %c%c\n",
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user_alpha2[0], user_alpha2[1]))
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return false;
|
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|
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return true;
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}
|
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|
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static const struct ieee80211_regdomain *
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reg_copy_regd(const struct ieee80211_regdomain *src_regd)
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{
|
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struct ieee80211_regdomain *regd;
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unsigned int i;
|
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|
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regd = kzalloc(struct_size(regd, reg_rules, src_regd->n_reg_rules),
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GFP_KERNEL);
|
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if (!regd)
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return ERR_PTR(-ENOMEM);
|
|
|
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memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
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|
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for (i = 0; i < src_regd->n_reg_rules; i++)
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memcpy(®d->reg_rules[i], &src_regd->reg_rules[i],
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sizeof(struct ieee80211_reg_rule));
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|
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return regd;
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}
|
|
|
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static void cfg80211_save_user_regdom(const struct ieee80211_regdomain *rd)
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|
{
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ASSERT_RTNL();
|
|
|
|
if (!IS_ERR(cfg80211_user_regdom))
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kfree(cfg80211_user_regdom);
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cfg80211_user_regdom = reg_copy_regd(rd);
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}
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|
|
|
struct reg_regdb_apply_request {
|
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struct list_head list;
|
|
const struct ieee80211_regdomain *regdom;
|
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};
|
|
|
|
static LIST_HEAD(reg_regdb_apply_list);
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static DEFINE_MUTEX(reg_regdb_apply_mutex);
|
|
|
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static void reg_regdb_apply(struct work_struct *work)
|
|
{
|
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struct reg_regdb_apply_request *request;
|
|
|
|
rtnl_lock();
|
|
|
|
mutex_lock(®_regdb_apply_mutex);
|
|
while (!list_empty(®_regdb_apply_list)) {
|
|
request = list_first_entry(®_regdb_apply_list,
|
|
struct reg_regdb_apply_request,
|
|
list);
|
|
list_del(&request->list);
|
|
|
|
set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
|
|
kfree(request);
|
|
}
|
|
mutex_unlock(®_regdb_apply_mutex);
|
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|
|
rtnl_unlock();
|
|
}
|
|
|
|
static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
|
|
|
|
static int reg_schedule_apply(const struct ieee80211_regdomain *regdom)
|
|
{
|
|
struct reg_regdb_apply_request *request;
|
|
|
|
request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
|
|
if (!request) {
|
|
kfree(regdom);
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|
return -ENOMEM;
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|
}
|
|
|
|
request->regdom = regdom;
|
|
|
|
mutex_lock(®_regdb_apply_mutex);
|
|
list_add_tail(&request->list, ®_regdb_apply_list);
|
|
mutex_unlock(®_regdb_apply_mutex);
|
|
|
|
schedule_work(®_regdb_work);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_CFG80211_CRDA_SUPPORT
|
|
/* Max number of consecutive attempts to communicate with CRDA */
|
|
#define REG_MAX_CRDA_TIMEOUTS 10
|
|
|
|
static u32 reg_crda_timeouts;
|
|
|
|
static void crda_timeout_work(struct work_struct *work);
|
|
static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work);
|
|
|
|
static void crda_timeout_work(struct work_struct *work)
|
|
{
|
|
pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
|
|
rtnl_lock();
|
|
reg_crda_timeouts++;
|
|
restore_regulatory_settings(true, false);
|
|
rtnl_unlock();
|
|
}
|
|
|
|
static void cancel_crda_timeout(void)
|
|
{
|
|
cancel_delayed_work(&crda_timeout);
|
|
}
|
|
|
|
static void cancel_crda_timeout_sync(void)
|
|
{
|
|
cancel_delayed_work_sync(&crda_timeout);
|
|
}
|
|
|
|
static void reset_crda_timeouts(void)
|
|
{
|
|
reg_crda_timeouts = 0;
|
|
}
|
|
|
|
/*
|
|
* This lets us keep regulatory code which is updated on a regulatory
|
|
* basis in userspace.
|
|
*/
|
|
static int call_crda(const char *alpha2)
|
|
{
|
|
char country[12];
|
|
char *env[] = { country, NULL };
|
|
int ret;
|
|
|
|
snprintf(country, sizeof(country), "COUNTRY=%c%c",
|
|
alpha2[0], alpha2[1]);
|
|
|
|
if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
|
|
pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!is_world_regdom((char *) alpha2))
|
|
pr_debug("Calling CRDA for country: %c%c\n",
|
|
alpha2[0], alpha2[1]);
|
|
else
|
|
pr_debug("Calling CRDA to update world regulatory domain\n");
|
|
|
|
ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env);
|
|
if (ret)
|
|
return ret;
|
|
|
|
queue_delayed_work(system_power_efficient_wq,
|
|
&crda_timeout, msecs_to_jiffies(3142));
|
|
return 0;
|
|
}
|
|
#else
|
|
static inline void cancel_crda_timeout(void) {}
|
|
static inline void cancel_crda_timeout_sync(void) {}
|
|
static inline void reset_crda_timeouts(void) {}
|
|
static inline int call_crda(const char *alpha2)
|
|
{
|
|
return -ENODATA;
|
|
}
|
|
#endif /* CONFIG_CFG80211_CRDA_SUPPORT */
|
|
|
|
/* code to directly load a firmware database through request_firmware */
|
|
static const struct fwdb_header *regdb;
|
|
|
|
struct fwdb_country {
|
|
u8 alpha2[2];
|
|
__be16 coll_ptr;
|
|
/* this struct cannot be extended */
|
|
} __packed __aligned(4);
|
|
|
|
struct fwdb_collection {
|
|
u8 len;
|
|
u8 n_rules;
|
|
u8 dfs_region;
|
|
/* no optional data yet */
|
|
/* aligned to 2, then followed by __be16 array of rule pointers */
|
|
} __packed __aligned(4);
|
|
|
|
enum fwdb_flags {
|
|
FWDB_FLAG_NO_OFDM = BIT(0),
|
|
FWDB_FLAG_NO_OUTDOOR = BIT(1),
|
|
FWDB_FLAG_DFS = BIT(2),
|
|
FWDB_FLAG_NO_IR = BIT(3),
|
|
FWDB_FLAG_AUTO_BW = BIT(4),
|
|
};
|
|
|
|
struct fwdb_wmm_ac {
|
|
u8 ecw;
|
|
u8 aifsn;
|
|
__be16 cot;
|
|
} __packed;
|
|
|
|
struct fwdb_wmm_rule {
|
|
struct fwdb_wmm_ac client[IEEE80211_NUM_ACS];
|
|
struct fwdb_wmm_ac ap[IEEE80211_NUM_ACS];
|
|
} __packed;
|
|
|
|
struct fwdb_rule {
|
|
u8 len;
|
|
u8 flags;
|
|
__be16 max_eirp;
|
|
__be32 start, end, max_bw;
|
|
/* start of optional data */
|
|
__be16 cac_timeout;
|
|
__be16 wmm_ptr;
|
|
} __packed __aligned(4);
|
|
|
|
#define FWDB_MAGIC 0x52474442
|
|
#define FWDB_VERSION 20
|
|
|
|
struct fwdb_header {
|
|
__be32 magic;
|
|
__be32 version;
|
|
struct fwdb_country country[];
|
|
} __packed __aligned(4);
|
|
|
|
static int ecw2cw(int ecw)
|
|
{
|
|
return (1 << ecw) - 1;
|
|
}
|
|
|
|
static bool valid_wmm(struct fwdb_wmm_rule *rule)
|
|
{
|
|
struct fwdb_wmm_ac *ac = (struct fwdb_wmm_ac *)rule;
|
|
int i;
|
|
|
|
for (i = 0; i < IEEE80211_NUM_ACS * 2; i++) {
|
|
u16 cw_min = ecw2cw((ac[i].ecw & 0xf0) >> 4);
|
|
u16 cw_max = ecw2cw(ac[i].ecw & 0x0f);
|
|
u8 aifsn = ac[i].aifsn;
|
|
|
|
if (cw_min >= cw_max)
|
|
return false;
|
|
|
|
if (aifsn < 1)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool valid_rule(const u8 *data, unsigned int size, u16 rule_ptr)
|
|
{
|
|
struct fwdb_rule *rule = (void *)(data + (rule_ptr << 2));
|
|
|
|
if ((u8 *)rule + sizeof(rule->len) > data + size)
|
|
return false;
|
|
|
|
/* mandatory fields */
|
|
if (rule->len < offsetofend(struct fwdb_rule, max_bw))
|
|
return false;
|
|
if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr)) {
|
|
u32 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
|
|
struct fwdb_wmm_rule *wmm;
|
|
|
|
if (wmm_ptr + sizeof(struct fwdb_wmm_rule) > size)
|
|
return false;
|
|
|
|
wmm = (void *)(data + wmm_ptr);
|
|
|
|
if (!valid_wmm(wmm))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool valid_country(const u8 *data, unsigned int size,
|
|
const struct fwdb_country *country)
|
|
{
|
|
unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
|
|
struct fwdb_collection *coll = (void *)(data + ptr);
|
|
__be16 *rules_ptr;
|
|
unsigned int i;
|
|
|
|
/* make sure we can read len/n_rules */
|
|
if ((u8 *)coll + offsetofend(typeof(*coll), n_rules) > data + size)
|
|
return false;
|
|
|
|
/* make sure base struct and all rules fit */
|
|
if ((u8 *)coll + ALIGN(coll->len, 2) +
|
|
(coll->n_rules * 2) > data + size)
|
|
return false;
|
|
|
|
/* mandatory fields must exist */
|
|
if (coll->len < offsetofend(struct fwdb_collection, dfs_region))
|
|
return false;
|
|
|
|
rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
|
|
|
|
for (i = 0; i < coll->n_rules; i++) {
|
|
u16 rule_ptr = be16_to_cpu(rules_ptr[i]);
|
|
|
|
if (!valid_rule(data, size, rule_ptr))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
#ifdef CONFIG_CFG80211_REQUIRE_SIGNED_REGDB
|
|
static struct key *builtin_regdb_keys;
|
|
|
|
static void __init load_keys_from_buffer(const u8 *p, unsigned int buflen)
|
|
{
|
|
const u8 *end = p + buflen;
|
|
size_t plen;
|
|
key_ref_t key;
|
|
|
|
while (p < end) {
|
|
/* Each cert begins with an ASN.1 SEQUENCE tag and must be more
|
|
* than 256 bytes in size.
|
|
*/
|
|
if (end - p < 4)
|
|
goto dodgy_cert;
|
|
if (p[0] != 0x30 &&
|
|
p[1] != 0x82)
|
|
goto dodgy_cert;
|
|
plen = (p[2] << 8) | p[3];
|
|
plen += 4;
|
|
if (plen > end - p)
|
|
goto dodgy_cert;
|
|
|
|
key = key_create_or_update(make_key_ref(builtin_regdb_keys, 1),
|
|
"asymmetric", NULL, p, plen,
|
|
((KEY_POS_ALL & ~KEY_POS_SETATTR) |
|
|
KEY_USR_VIEW | KEY_USR_READ),
|
|
KEY_ALLOC_NOT_IN_QUOTA |
|
|
KEY_ALLOC_BUILT_IN |
|
|
KEY_ALLOC_BYPASS_RESTRICTION);
|
|
if (IS_ERR(key)) {
|
|
pr_err("Problem loading in-kernel X.509 certificate (%ld)\n",
|
|
PTR_ERR(key));
|
|
} else {
|
|
pr_notice("Loaded X.509 cert '%s'\n",
|
|
key_ref_to_ptr(key)->description);
|
|
key_ref_put(key);
|
|
}
|
|
p += plen;
|
|
}
|
|
|
|
return;
|
|
|
|
dodgy_cert:
|
|
pr_err("Problem parsing in-kernel X.509 certificate list\n");
|
|
}
|
|
|
|
static int __init load_builtin_regdb_keys(void)
|
|
{
|
|
builtin_regdb_keys =
|
|
keyring_alloc(".builtin_regdb_keys",
|
|
KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
|
|
((KEY_POS_ALL & ~KEY_POS_SETATTR) |
|
|
KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH),
|
|
KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL);
|
|
if (IS_ERR(builtin_regdb_keys))
|
|
return PTR_ERR(builtin_regdb_keys);
|
|
|
|
pr_notice("Loading compiled-in X.509 certificates for regulatory database\n");
|
|
|
|
#ifdef CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS
|
|
load_keys_from_buffer(shipped_regdb_certs, shipped_regdb_certs_len);
|
|
#endif
|
|
#ifdef CONFIG_CFG80211_EXTRA_REGDB_KEYDIR
|
|
if (CONFIG_CFG80211_EXTRA_REGDB_KEYDIR[0] != '\0')
|
|
load_keys_from_buffer(extra_regdb_certs, extra_regdb_certs_len);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
|
|
{
|
|
const struct firmware *sig;
|
|
bool result;
|
|
|
|
if (request_firmware(&sig, "regulatory.db.p7s", ®_pdev->dev))
|
|
return false;
|
|
|
|
result = verify_pkcs7_signature(data, size, sig->data, sig->size,
|
|
builtin_regdb_keys,
|
|
VERIFYING_UNSPECIFIED_SIGNATURE,
|
|
NULL, NULL) == 0;
|
|
|
|
release_firmware(sig);
|
|
|
|
return result;
|
|
}
|
|
|
|
static void free_regdb_keyring(void)
|
|
{
|
|
key_put(builtin_regdb_keys);
|
|
}
|
|
#else
|
|
static int load_builtin_regdb_keys(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static void free_regdb_keyring(void)
|
|
{
|
|
}
|
|
#endif /* CONFIG_CFG80211_REQUIRE_SIGNED_REGDB */
|
|
|
|
static bool valid_regdb(const u8 *data, unsigned int size)
|
|
{
|
|
const struct fwdb_header *hdr = (void *)data;
|
|
const struct fwdb_country *country;
|
|
|
|
if (size < sizeof(*hdr))
|
|
return false;
|
|
|
|
if (hdr->magic != cpu_to_be32(FWDB_MAGIC))
|
|
return false;
|
|
|
|
if (hdr->version != cpu_to_be32(FWDB_VERSION))
|
|
return false;
|
|
|
|
if (!regdb_has_valid_signature(data, size))
|
|
return false;
|
|
|
|
country = &hdr->country[0];
|
|
while ((u8 *)(country + 1) <= data + size) {
|
|
if (!country->coll_ptr)
|
|
break;
|
|
if (!valid_country(data, size, country))
|
|
return false;
|
|
country++;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static void set_wmm_rule(const struct fwdb_header *db,
|
|
const struct fwdb_country *country,
|
|
const struct fwdb_rule *rule,
|
|
struct ieee80211_reg_rule *rrule)
|
|
{
|
|
struct ieee80211_wmm_rule *wmm_rule = &rrule->wmm_rule;
|
|
struct fwdb_wmm_rule *wmm;
|
|
unsigned int i, wmm_ptr;
|
|
|
|
wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
|
|
wmm = (void *)((u8 *)db + wmm_ptr);
|
|
|
|
if (!valid_wmm(wmm)) {
|
|
pr_err("Invalid regulatory WMM rule %u-%u in domain %c%c\n",
|
|
be32_to_cpu(rule->start), be32_to_cpu(rule->end),
|
|
country->alpha2[0], country->alpha2[1]);
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < IEEE80211_NUM_ACS; i++) {
|
|
wmm_rule->client[i].cw_min =
|
|
ecw2cw((wmm->client[i].ecw & 0xf0) >> 4);
|
|
wmm_rule->client[i].cw_max = ecw2cw(wmm->client[i].ecw & 0x0f);
|
|
wmm_rule->client[i].aifsn = wmm->client[i].aifsn;
|
|
wmm_rule->client[i].cot =
|
|
1000 * be16_to_cpu(wmm->client[i].cot);
|
|
wmm_rule->ap[i].cw_min = ecw2cw((wmm->ap[i].ecw & 0xf0) >> 4);
|
|
wmm_rule->ap[i].cw_max = ecw2cw(wmm->ap[i].ecw & 0x0f);
|
|
wmm_rule->ap[i].aifsn = wmm->ap[i].aifsn;
|
|
wmm_rule->ap[i].cot = 1000 * be16_to_cpu(wmm->ap[i].cot);
|
|
}
|
|
|
|
rrule->has_wmm = true;
|
|
}
|
|
|
|
static int __regdb_query_wmm(const struct fwdb_header *db,
|
|
const struct fwdb_country *country, int freq,
|
|
struct ieee80211_reg_rule *rrule)
|
|
{
|
|
unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
|
|
struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
|
|
int i;
|
|
|
|
for (i = 0; i < coll->n_rules; i++) {
|
|
__be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
|
|
unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
|
|
struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
|
|
|
|
if (rule->len < offsetofend(struct fwdb_rule, wmm_ptr))
|
|
continue;
|
|
|
|
if (freq >= KHZ_TO_MHZ(be32_to_cpu(rule->start)) &&
|
|
freq <= KHZ_TO_MHZ(be32_to_cpu(rule->end))) {
|
|
set_wmm_rule(db, country, rule, rrule);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -ENODATA;
|
|
}
|
|
|
|
int reg_query_regdb_wmm(char *alpha2, int freq, struct ieee80211_reg_rule *rule)
|
|
{
|
|
const struct fwdb_header *hdr = regdb;
|
|
const struct fwdb_country *country;
|
|
|
|
if (!regdb)
|
|
return -ENODATA;
|
|
|
|
if (IS_ERR(regdb))
|
|
return PTR_ERR(regdb);
|
|
|
|
country = &hdr->country[0];
|
|
while (country->coll_ptr) {
|
|
if (alpha2_equal(alpha2, country->alpha2))
|
|
return __regdb_query_wmm(regdb, country, freq, rule);
|
|
|
|
country++;
|
|
}
|
|
|
|
return -ENODATA;
|
|
}
|
|
EXPORT_SYMBOL(reg_query_regdb_wmm);
|
|
|
|
static int regdb_query_country(const struct fwdb_header *db,
|
|
const struct fwdb_country *country)
|
|
{
|
|
unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
|
|
struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
|
|
struct ieee80211_regdomain *regdom;
|
|
unsigned int i;
|
|
|
|
regdom = kzalloc(struct_size(regdom, reg_rules, coll->n_rules),
|
|
GFP_KERNEL);
|
|
if (!regdom)
|
|
return -ENOMEM;
|
|
|
|
regdom->n_reg_rules = coll->n_rules;
|
|
regdom->alpha2[0] = country->alpha2[0];
|
|
regdom->alpha2[1] = country->alpha2[1];
|
|
regdom->dfs_region = coll->dfs_region;
|
|
|
|
for (i = 0; i < regdom->n_reg_rules; i++) {
|
|
__be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
|
|
unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
|
|
struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
|
|
struct ieee80211_reg_rule *rrule = ®dom->reg_rules[i];
|
|
|
|
rrule->freq_range.start_freq_khz = be32_to_cpu(rule->start);
|
|
rrule->freq_range.end_freq_khz = be32_to_cpu(rule->end);
|
|
rrule->freq_range.max_bandwidth_khz = be32_to_cpu(rule->max_bw);
|
|
|
|
rrule->power_rule.max_antenna_gain = 0;
|
|
rrule->power_rule.max_eirp = be16_to_cpu(rule->max_eirp);
|
|
|
|
rrule->flags = 0;
|
|
if (rule->flags & FWDB_FLAG_NO_OFDM)
|
|
rrule->flags |= NL80211_RRF_NO_OFDM;
|
|
if (rule->flags & FWDB_FLAG_NO_OUTDOOR)
|
|
rrule->flags |= NL80211_RRF_NO_OUTDOOR;
|
|
if (rule->flags & FWDB_FLAG_DFS)
|
|
rrule->flags |= NL80211_RRF_DFS;
|
|
if (rule->flags & FWDB_FLAG_NO_IR)
|
|
rrule->flags |= NL80211_RRF_NO_IR;
|
|
if (rule->flags & FWDB_FLAG_AUTO_BW)
|
|
rrule->flags |= NL80211_RRF_AUTO_BW;
|
|
|
|
rrule->dfs_cac_ms = 0;
|
|
|
|
/* handle optional data */
|
|
if (rule->len >= offsetofend(struct fwdb_rule, cac_timeout))
|
|
rrule->dfs_cac_ms =
|
|
1000 * be16_to_cpu(rule->cac_timeout);
|
|
if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr))
|
|
set_wmm_rule(db, country, rule, rrule);
|
|
}
|
|
|
|
return reg_schedule_apply(regdom);
|
|
}
|
|
|
|
static int query_regdb(const char *alpha2)
|
|
{
|
|
const struct fwdb_header *hdr = regdb;
|
|
const struct fwdb_country *country;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (IS_ERR(regdb))
|
|
return PTR_ERR(regdb);
|
|
|
|
country = &hdr->country[0];
|
|
while (country->coll_ptr) {
|
|
if (alpha2_equal(alpha2, country->alpha2))
|
|
return regdb_query_country(regdb, country);
|
|
country++;
|
|
}
|
|
|
|
return -ENODATA;
|
|
}
|
|
|
|
static void regdb_fw_cb(const struct firmware *fw, void *context)
|
|
{
|
|
int set_error = 0;
|
|
bool restore = true;
|
|
void *db;
|
|
|
|
if (!fw) {
|
|
pr_info("failed to load regulatory.db\n");
|
|
set_error = -ENODATA;
|
|
} else if (!valid_regdb(fw->data, fw->size)) {
|
|
pr_info("loaded regulatory.db is malformed or signature is missing/invalid\n");
|
|
set_error = -EINVAL;
|
|
}
|
|
|
|
rtnl_lock();
|
|
if (regdb && !IS_ERR(regdb)) {
|
|
/* negative case - a bug
|
|
* positive case - can happen due to race in case of multiple cb's in
|
|
* queue, due to usage of asynchronous callback
|
|
*
|
|
* Either case, just restore and free new db.
|
|
*/
|
|
} else if (set_error) {
|
|
regdb = ERR_PTR(set_error);
|
|
} else if (fw) {
|
|
db = kmemdup(fw->data, fw->size, GFP_KERNEL);
|
|
if (db) {
|
|
regdb = db;
|
|
restore = context && query_regdb(context);
|
|
} else {
|
|
restore = true;
|
|
}
|
|
}
|
|
|
|
if (restore)
|
|
restore_regulatory_settings(true, false);
|
|
|
|
rtnl_unlock();
|
|
|
|
kfree(context);
|
|
|
|
release_firmware(fw);
|
|
}
|
|
|
|
static int query_regdb_file(const char *alpha2)
|
|
{
|
|
ASSERT_RTNL();
|
|
|
|
if (regdb)
|
|
return query_regdb(alpha2);
|
|
|
|
alpha2 = kmemdup(alpha2, 2, GFP_KERNEL);
|
|
if (!alpha2)
|
|
return -ENOMEM;
|
|
|
|
return request_firmware_nowait(THIS_MODULE, true, "regulatory.db",
|
|
®_pdev->dev, GFP_KERNEL,
|
|
(void *)alpha2, regdb_fw_cb);
|
|
}
|
|
|
|
int reg_reload_regdb(void)
|
|
{
|
|
const struct firmware *fw;
|
|
void *db;
|
|
int err;
|
|
|
|
err = request_firmware(&fw, "regulatory.db", ®_pdev->dev);
|
|
if (err)
|
|
return err;
|
|
|
|
if (!valid_regdb(fw->data, fw->size)) {
|
|
err = -ENODATA;
|
|
goto out;
|
|
}
|
|
|
|
db = kmemdup(fw->data, fw->size, GFP_KERNEL);
|
|
if (!db) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
rtnl_lock();
|
|
if (!IS_ERR_OR_NULL(regdb))
|
|
kfree(regdb);
|
|
regdb = db;
|
|
rtnl_unlock();
|
|
|
|
out:
|
|
release_firmware(fw);
|
|
return err;
|
|
}
|
|
|
|
static bool reg_query_database(struct regulatory_request *request)
|
|
{
|
|
if (query_regdb_file(request->alpha2) == 0)
|
|
return true;
|
|
|
|
if (call_crda(request->alpha2) == 0)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
bool reg_is_valid_request(const char *alpha2)
|
|
{
|
|
struct regulatory_request *lr = get_last_request();
|
|
|
|
if (!lr || lr->processed)
|
|
return false;
|
|
|
|
return alpha2_equal(lr->alpha2, alpha2);
|
|
}
|
|
|
|
static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
|
|
{
|
|
struct regulatory_request *lr = get_last_request();
|
|
|
|
/*
|
|
* Follow the driver's regulatory domain, if present, unless a country
|
|
* IE has been processed or a user wants to help complaince further
|
|
*/
|
|
if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
|
|
lr->initiator != NL80211_REGDOM_SET_BY_USER &&
|
|
wiphy->regd)
|
|
return get_wiphy_regdom(wiphy);
|
|
|
|
return get_cfg80211_regdom();
|
|
}
|
|
|
|
static unsigned int
|
|
reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
|
|
const struct ieee80211_reg_rule *rule)
|
|
{
|
|
const struct ieee80211_freq_range *freq_range = &rule->freq_range;
|
|
const struct ieee80211_freq_range *freq_range_tmp;
|
|
const struct ieee80211_reg_rule *tmp;
|
|
u32 start_freq, end_freq, idx, no;
|
|
|
|
for (idx = 0; idx < rd->n_reg_rules; idx++)
|
|
if (rule == &rd->reg_rules[idx])
|
|
break;
|
|
|
|
if (idx == rd->n_reg_rules)
|
|
return 0;
|
|
|
|
/* get start_freq */
|
|
no = idx;
|
|
|
|
while (no) {
|
|
tmp = &rd->reg_rules[--no];
|
|
freq_range_tmp = &tmp->freq_range;
|
|
|
|
if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
|
|
break;
|
|
|
|
freq_range = freq_range_tmp;
|
|
}
|
|
|
|
start_freq = freq_range->start_freq_khz;
|
|
|
|
/* get end_freq */
|
|
freq_range = &rule->freq_range;
|
|
no = idx;
|
|
|
|
while (no < rd->n_reg_rules - 1) {
|
|
tmp = &rd->reg_rules[++no];
|
|
freq_range_tmp = &tmp->freq_range;
|
|
|
|
if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
|
|
break;
|
|
|
|
freq_range = freq_range_tmp;
|
|
}
|
|
|
|
end_freq = freq_range->end_freq_khz;
|
|
|
|
return end_freq - start_freq;
|
|
}
|
|
|
|
unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
|
|
const struct ieee80211_reg_rule *rule)
|
|
{
|
|
unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
|
|
|
|
if (rule->flags & NL80211_RRF_NO_160MHZ)
|
|
bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
|
|
if (rule->flags & NL80211_RRF_NO_80MHZ)
|
|
bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
|
|
|
|
/*
|
|
* HT40+/HT40- limits are handled per-channel. Only limit BW if both
|
|
* are not allowed.
|
|
*/
|
|
if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
|
|
rule->flags & NL80211_RRF_NO_HT40PLUS)
|
|
bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
|
|
|
|
return bw;
|
|
}
|
|
|
|
/* Sanity check on a regulatory rule */
|
|
static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
|
|
{
|
|
const struct ieee80211_freq_range *freq_range = &rule->freq_range;
|
|
u32 freq_diff;
|
|
|
|
if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
|
|
return false;
|
|
|
|
if (freq_range->start_freq_khz > freq_range->end_freq_khz)
|
|
return false;
|
|
|
|
freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
|
|
|
|
if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
|
|
freq_range->max_bandwidth_khz > freq_diff)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool is_valid_rd(const struct ieee80211_regdomain *rd)
|
|
{
|
|
const struct ieee80211_reg_rule *reg_rule = NULL;
|
|
unsigned int i;
|
|
|
|
if (!rd->n_reg_rules)
|
|
return false;
|
|
|
|
if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
|
|
return false;
|
|
|
|
for (i = 0; i < rd->n_reg_rules; i++) {
|
|
reg_rule = &rd->reg_rules[i];
|
|
if (!is_valid_reg_rule(reg_rule))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* freq_in_rule_band - tells us if a frequency is in a frequency band
|
|
* @freq_range: frequency rule we want to query
|
|
* @freq_khz: frequency we are inquiring about
|
|
*
|
|
* This lets us know if a specific frequency rule is or is not relevant to
|
|
* a specific frequency's band. Bands are device specific and artificial
|
|
* definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
|
|
* however it is safe for now to assume that a frequency rule should not be
|
|
* part of a frequency's band if the start freq or end freq are off by more
|
|
* than 2 GHz for the 2.4 and 5 GHz bands, and by more than 20 GHz for the
|
|
* 60 GHz band.
|
|
* This resolution can be lowered and should be considered as we add
|
|
* regulatory rule support for other "bands".
|
|
**/
|
|
static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
|
|
u32 freq_khz)
|
|
{
|
|
#define ONE_GHZ_IN_KHZ 1000000
|
|
/*
|
|
* From 802.11ad: directional multi-gigabit (DMG):
|
|
* Pertaining to operation in a frequency band containing a channel
|
|
* with the Channel starting frequency above 45 GHz.
|
|
*/
|
|
u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
|
|
20 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
|
|
if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
|
|
return true;
|
|
if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
|
|
return true;
|
|
return false;
|
|
#undef ONE_GHZ_IN_KHZ
|
|
}
|
|
|
|
/*
|
|
* Later on we can perhaps use the more restrictive DFS
|
|
* region but we don't have information for that yet so
|
|
* for now simply disallow conflicts.
|
|
*/
|
|
static enum nl80211_dfs_regions
|
|
reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
|
|
const enum nl80211_dfs_regions dfs_region2)
|
|
{
|
|
if (dfs_region1 != dfs_region2)
|
|
return NL80211_DFS_UNSET;
|
|
return dfs_region1;
|
|
}
|
|
|
|
static void reg_wmm_rules_intersect(const struct ieee80211_wmm_ac *wmm_ac1,
|
|
const struct ieee80211_wmm_ac *wmm_ac2,
|
|
struct ieee80211_wmm_ac *intersect)
|
|
{
|
|
intersect->cw_min = max_t(u16, wmm_ac1->cw_min, wmm_ac2->cw_min);
|
|
intersect->cw_max = max_t(u16, wmm_ac1->cw_max, wmm_ac2->cw_max);
|
|
intersect->cot = min_t(u16, wmm_ac1->cot, wmm_ac2->cot);
|
|
intersect->aifsn = max_t(u8, wmm_ac1->aifsn, wmm_ac2->aifsn);
|
|
}
|
|
|
|
/*
|
|
* Helper for regdom_intersect(), this does the real
|
|
* mathematical intersection fun
|
|
*/
|
|
static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
|
|
const struct ieee80211_regdomain *rd2,
|
|
const struct ieee80211_reg_rule *rule1,
|
|
const struct ieee80211_reg_rule *rule2,
|
|
struct ieee80211_reg_rule *intersected_rule)
|
|
{
|
|
const struct ieee80211_freq_range *freq_range1, *freq_range2;
|
|
struct ieee80211_freq_range *freq_range;
|
|
const struct ieee80211_power_rule *power_rule1, *power_rule2;
|
|
struct ieee80211_power_rule *power_rule;
|
|
const struct ieee80211_wmm_rule *wmm_rule1, *wmm_rule2;
|
|
struct ieee80211_wmm_rule *wmm_rule;
|
|
u32 freq_diff, max_bandwidth1, max_bandwidth2;
|
|
|
|
freq_range1 = &rule1->freq_range;
|
|
freq_range2 = &rule2->freq_range;
|
|
freq_range = &intersected_rule->freq_range;
|
|
|
|
power_rule1 = &rule1->power_rule;
|
|
power_rule2 = &rule2->power_rule;
|
|
power_rule = &intersected_rule->power_rule;
|
|
|
|
wmm_rule1 = &rule1->wmm_rule;
|
|
wmm_rule2 = &rule2->wmm_rule;
|
|
wmm_rule = &intersected_rule->wmm_rule;
|
|
|
|
freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
|
|
freq_range2->start_freq_khz);
|
|
freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
|
|
freq_range2->end_freq_khz);
|
|
|
|
max_bandwidth1 = freq_range1->max_bandwidth_khz;
|
|
max_bandwidth2 = freq_range2->max_bandwidth_khz;
|
|
|
|
if (rule1->flags & NL80211_RRF_AUTO_BW)
|
|
max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
|
|
if (rule2->flags & NL80211_RRF_AUTO_BW)
|
|
max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
|
|
|
|
freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
|
|
|
|
intersected_rule->flags = rule1->flags | rule2->flags;
|
|
|
|
/*
|
|
* In case NL80211_RRF_AUTO_BW requested for both rules
|
|
* set AUTO_BW in intersected rule also. Next we will
|
|
* calculate BW correctly in handle_channel function.
|
|
* In other case remove AUTO_BW flag while we calculate
|
|
* maximum bandwidth correctly and auto calculation is
|
|
* not required.
|
|
*/
|
|
if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
|
|
(rule2->flags & NL80211_RRF_AUTO_BW))
|
|
intersected_rule->flags |= NL80211_RRF_AUTO_BW;
|
|
else
|
|
intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
|
|
|
|
freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
|
|
if (freq_range->max_bandwidth_khz > freq_diff)
|
|
freq_range->max_bandwidth_khz = freq_diff;
|
|
|
|
power_rule->max_eirp = min(power_rule1->max_eirp,
|
|
power_rule2->max_eirp);
|
|
power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
|
|
power_rule2->max_antenna_gain);
|
|
|
|
intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
|
|
rule2->dfs_cac_ms);
|
|
|
|
if (rule1->has_wmm && rule2->has_wmm) {
|
|
u8 ac;
|
|
|
|
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
|
|
reg_wmm_rules_intersect(&wmm_rule1->client[ac],
|
|
&wmm_rule2->client[ac],
|
|
&wmm_rule->client[ac]);
|
|
reg_wmm_rules_intersect(&wmm_rule1->ap[ac],
|
|
&wmm_rule2->ap[ac],
|
|
&wmm_rule->ap[ac]);
|
|
}
|
|
|
|
intersected_rule->has_wmm = true;
|
|
} else if (rule1->has_wmm) {
|
|
*wmm_rule = *wmm_rule1;
|
|
intersected_rule->has_wmm = true;
|
|
} else if (rule2->has_wmm) {
|
|
*wmm_rule = *wmm_rule2;
|
|
intersected_rule->has_wmm = true;
|
|
} else {
|
|
intersected_rule->has_wmm = false;
|
|
}
|
|
|
|
if (!is_valid_reg_rule(intersected_rule))
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* check whether old rule contains new rule */
|
|
static bool rule_contains(struct ieee80211_reg_rule *r1,
|
|
struct ieee80211_reg_rule *r2)
|
|
{
|
|
/* for simplicity, currently consider only same flags */
|
|
if (r1->flags != r2->flags)
|
|
return false;
|
|
|
|
/* verify r1 is more restrictive */
|
|
if ((r1->power_rule.max_antenna_gain >
|
|
r2->power_rule.max_antenna_gain) ||
|
|
r1->power_rule.max_eirp > r2->power_rule.max_eirp)
|
|
return false;
|
|
|
|
/* make sure r2's range is contained within r1 */
|
|
if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
|
|
r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
|
|
return false;
|
|
|
|
/* and finally verify that r1.max_bw >= r2.max_bw */
|
|
if (r1->freq_range.max_bandwidth_khz <
|
|
r2->freq_range.max_bandwidth_khz)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/* add or extend current rules. do nothing if rule is already contained */
|
|
static void add_rule(struct ieee80211_reg_rule *rule,
|
|
struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
|
|
{
|
|
struct ieee80211_reg_rule *tmp_rule;
|
|
int i;
|
|
|
|
for (i = 0; i < *n_rules; i++) {
|
|
tmp_rule = ®_rules[i];
|
|
/* rule is already contained - do nothing */
|
|
if (rule_contains(tmp_rule, rule))
|
|
return;
|
|
|
|
/* extend rule if possible */
|
|
if (rule_contains(rule, tmp_rule)) {
|
|
memcpy(tmp_rule, rule, sizeof(*rule));
|
|
return;
|
|
}
|
|
}
|
|
|
|
memcpy(®_rules[*n_rules], rule, sizeof(*rule));
|
|
(*n_rules)++;
|
|
}
|
|
|
|
/**
|
|
* regdom_intersect - do the intersection between two regulatory domains
|
|
* @rd1: first regulatory domain
|
|
* @rd2: second regulatory domain
|
|
*
|
|
* Use this function to get the intersection between two regulatory domains.
|
|
* Once completed we will mark the alpha2 for the rd as intersected, "98",
|
|
* as no one single alpha2 can represent this regulatory domain.
|
|
*
|
|
* Returns a pointer to the regulatory domain structure which will hold the
|
|
* resulting intersection of rules between rd1 and rd2. We will
|
|
* kzalloc() this structure for you.
|
|
*/
|
|
static struct ieee80211_regdomain *
|
|
regdom_intersect(const struct ieee80211_regdomain *rd1,
|
|
const struct ieee80211_regdomain *rd2)
|
|
{
|
|
int r;
|
|
unsigned int x, y;
|
|
unsigned int num_rules = 0;
|
|
const struct ieee80211_reg_rule *rule1, *rule2;
|
|
struct ieee80211_reg_rule intersected_rule;
|
|
struct ieee80211_regdomain *rd;
|
|
|
|
if (!rd1 || !rd2)
|
|
return NULL;
|
|
|
|
/*
|
|
* First we get a count of the rules we'll need, then we actually
|
|
* build them. This is to so we can malloc() and free() a
|
|
* regdomain once. The reason we use reg_rules_intersect() here
|
|
* is it will return -EINVAL if the rule computed makes no sense.
|
|
* All rules that do check out OK are valid.
|
|
*/
|
|
|
|
for (x = 0; x < rd1->n_reg_rules; x++) {
|
|
rule1 = &rd1->reg_rules[x];
|
|
for (y = 0; y < rd2->n_reg_rules; y++) {
|
|
rule2 = &rd2->reg_rules[y];
|
|
if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
|
|
&intersected_rule))
|
|
num_rules++;
|
|
}
|
|
}
|
|
|
|
if (!num_rules)
|
|
return NULL;
|
|
|
|
rd = kzalloc(struct_size(rd, reg_rules, num_rules), GFP_KERNEL);
|
|
if (!rd)
|
|
return NULL;
|
|
|
|
for (x = 0; x < rd1->n_reg_rules; x++) {
|
|
rule1 = &rd1->reg_rules[x];
|
|
for (y = 0; y < rd2->n_reg_rules; y++) {
|
|
rule2 = &rd2->reg_rules[y];
|
|
r = reg_rules_intersect(rd1, rd2, rule1, rule2,
|
|
&intersected_rule);
|
|
/*
|
|
* No need to memset here the intersected rule here as
|
|
* we're not using the stack anymore
|
|
*/
|
|
if (r)
|
|
continue;
|
|
|
|
add_rule(&intersected_rule, rd->reg_rules,
|
|
&rd->n_reg_rules);
|
|
}
|
|
}
|
|
|
|
rd->alpha2[0] = '9';
|
|
rd->alpha2[1] = '8';
|
|
rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
|
|
rd2->dfs_region);
|
|
|
|
return rd;
|
|
}
|
|
|
|
/*
|
|
* XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
|
|
* want to just have the channel structure use these
|
|
*/
|
|
static u32 map_regdom_flags(u32 rd_flags)
|
|
{
|
|
u32 channel_flags = 0;
|
|
if (rd_flags & NL80211_RRF_NO_IR_ALL)
|
|
channel_flags |= IEEE80211_CHAN_NO_IR;
|
|
if (rd_flags & NL80211_RRF_DFS)
|
|
channel_flags |= IEEE80211_CHAN_RADAR;
|
|
if (rd_flags & NL80211_RRF_NO_OFDM)
|
|
channel_flags |= IEEE80211_CHAN_NO_OFDM;
|
|
if (rd_flags & NL80211_RRF_NO_OUTDOOR)
|
|
channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
|
|
if (rd_flags & NL80211_RRF_IR_CONCURRENT)
|
|
channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
|
|
if (rd_flags & NL80211_RRF_NO_HT40MINUS)
|
|
channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
|
|
if (rd_flags & NL80211_RRF_NO_HT40PLUS)
|
|
channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
|
|
if (rd_flags & NL80211_RRF_NO_80MHZ)
|
|
channel_flags |= IEEE80211_CHAN_NO_80MHZ;
|
|
if (rd_flags & NL80211_RRF_NO_160MHZ)
|
|
channel_flags |= IEEE80211_CHAN_NO_160MHZ;
|
|
if (rd_flags & NL80211_RRF_NO_HE)
|
|
channel_flags |= IEEE80211_CHAN_NO_HE;
|
|
return channel_flags;
|
|
}
|
|
|
|
static const struct ieee80211_reg_rule *
|
|
freq_reg_info_regd(u32 center_freq,
|
|
const struct ieee80211_regdomain *regd, u32 bw)
|
|
{
|
|
int i;
|
|
bool band_rule_found = false;
|
|
bool bw_fits = false;
|
|
|
|
if (!regd)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
for (i = 0; i < regd->n_reg_rules; i++) {
|
|
const struct ieee80211_reg_rule *rr;
|
|
const struct ieee80211_freq_range *fr = NULL;
|
|
|
|
rr = ®d->reg_rules[i];
|
|
fr = &rr->freq_range;
|
|
|
|
/*
|
|
* We only need to know if one frequency rule was
|
|
* in center_freq's band, that's enough, so let's
|
|
* not overwrite it once found
|
|
*/
|
|
if (!band_rule_found)
|
|
band_rule_found = freq_in_rule_band(fr, center_freq);
|
|
|
|
bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw);
|
|
|
|
if (band_rule_found && bw_fits)
|
|
return rr;
|
|
}
|
|
|
|
if (!band_rule_found)
|
|
return ERR_PTR(-ERANGE);
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
static const struct ieee80211_reg_rule *
|
|
__freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
|
|
{
|
|
const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
|
|
static const u32 bws[] = {0, 1, 2, 4, 5, 8, 10, 16, 20};
|
|
const struct ieee80211_reg_rule *reg_rule;
|
|
int i = ARRAY_SIZE(bws) - 1;
|
|
u32 bw;
|
|
|
|
for (bw = MHZ_TO_KHZ(bws[i]); bw >= min_bw; bw = MHZ_TO_KHZ(bws[i--])) {
|
|
reg_rule = freq_reg_info_regd(center_freq, regd, bw);
|
|
if (!IS_ERR(reg_rule))
|
|
return reg_rule;
|
|
}
|
|
|
|
return reg_rule;
|
|
}
|
|
|
|
const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
|
|
u32 center_freq)
|
|
{
|
|
u32 min_bw = center_freq < MHZ_TO_KHZ(1000) ? 1 : 20;
|
|
|
|
return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(min_bw));
|
|
}
|
|
EXPORT_SYMBOL(freq_reg_info);
|
|
|
|
const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
|
|
{
|
|
switch (initiator) {
|
|
case NL80211_REGDOM_SET_BY_CORE:
|
|
return "core";
|
|
case NL80211_REGDOM_SET_BY_USER:
|
|
return "user";
|
|
case NL80211_REGDOM_SET_BY_DRIVER:
|
|
return "driver";
|
|
case NL80211_REGDOM_SET_BY_COUNTRY_IE:
|
|
return "country element";
|
|
default:
|
|
WARN_ON(1);
|
|
return "bug";
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(reg_initiator_name);
|
|
|
|
static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd,
|
|
const struct ieee80211_reg_rule *reg_rule,
|
|
const struct ieee80211_channel *chan)
|
|
{
|
|
const struct ieee80211_freq_range *freq_range = NULL;
|
|
u32 max_bandwidth_khz, center_freq_khz, bw_flags = 0;
|
|
bool is_s1g = chan->band == NL80211_BAND_S1GHZ;
|
|
|
|
freq_range = ®_rule->freq_range;
|
|
|
|
max_bandwidth_khz = freq_range->max_bandwidth_khz;
|
|
center_freq_khz = ieee80211_channel_to_khz(chan);
|
|
/* Check if auto calculation requested */
|
|
if (reg_rule->flags & NL80211_RRF_AUTO_BW)
|
|
max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
|
|
|
|
/* If we get a reg_rule we can assume that at least 5Mhz fit */
|
|
if (!cfg80211_does_bw_fit_range(freq_range,
|
|
center_freq_khz,
|
|
MHZ_TO_KHZ(10)))
|
|
bw_flags |= IEEE80211_CHAN_NO_10MHZ;
|
|
if (!cfg80211_does_bw_fit_range(freq_range,
|
|
center_freq_khz,
|
|
MHZ_TO_KHZ(20)))
|
|
bw_flags |= IEEE80211_CHAN_NO_20MHZ;
|
|
|
|
if (is_s1g) {
|
|
/* S1G is strict about non overlapping channels. We can
|
|
* calculate which bandwidth is allowed per channel by finding
|
|
* the largest bandwidth which cleanly divides the freq_range.
|
|
*/
|
|
int edge_offset;
|
|
int ch_bw = max_bandwidth_khz;
|
|
|
|
while (ch_bw) {
|
|
edge_offset = (center_freq_khz - ch_bw / 2) -
|
|
freq_range->start_freq_khz;
|
|
if (edge_offset % ch_bw == 0) {
|
|
switch (KHZ_TO_MHZ(ch_bw)) {
|
|
case 1:
|
|
bw_flags |= IEEE80211_CHAN_1MHZ;
|
|
break;
|
|
case 2:
|
|
bw_flags |= IEEE80211_CHAN_2MHZ;
|
|
break;
|
|
case 4:
|
|
bw_flags |= IEEE80211_CHAN_4MHZ;
|
|
break;
|
|
case 8:
|
|
bw_flags |= IEEE80211_CHAN_8MHZ;
|
|
break;
|
|
case 16:
|
|
bw_flags |= IEEE80211_CHAN_16MHZ;
|
|
break;
|
|
default:
|
|
/* If we got here, no bandwidths fit on
|
|
* this frequency, ie. band edge.
|
|
*/
|
|
bw_flags |= IEEE80211_CHAN_DISABLED;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
ch_bw /= 2;
|
|
}
|
|
} else {
|
|
if (max_bandwidth_khz < MHZ_TO_KHZ(10))
|
|
bw_flags |= IEEE80211_CHAN_NO_10MHZ;
|
|
if (max_bandwidth_khz < MHZ_TO_KHZ(20))
|
|
bw_flags |= IEEE80211_CHAN_NO_20MHZ;
|
|
if (max_bandwidth_khz < MHZ_TO_KHZ(40))
|
|
bw_flags |= IEEE80211_CHAN_NO_HT40;
|
|
if (max_bandwidth_khz < MHZ_TO_KHZ(80))
|
|
bw_flags |= IEEE80211_CHAN_NO_80MHZ;
|
|
if (max_bandwidth_khz < MHZ_TO_KHZ(160))
|
|
bw_flags |= IEEE80211_CHAN_NO_160MHZ;
|
|
}
|
|
return bw_flags;
|
|
}
|
|
|
|
static void handle_channel_single_rule(struct wiphy *wiphy,
|
|
enum nl80211_reg_initiator initiator,
|
|
struct ieee80211_channel *chan,
|
|
u32 flags,
|
|
struct regulatory_request *lr,
|
|
struct wiphy *request_wiphy,
|
|
const struct ieee80211_reg_rule *reg_rule)
|
|
{
|
|
u32 bw_flags = 0;
|
|
const struct ieee80211_power_rule *power_rule = NULL;
|
|
const struct ieee80211_regdomain *regd;
|
|
|
|
regd = reg_get_regdomain(wiphy);
|
|
|
|
power_rule = ®_rule->power_rule;
|
|
bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
|
|
|
|
if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
|
|
request_wiphy && request_wiphy == wiphy &&
|
|
request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
|
|
/*
|
|
* This guarantees the driver's requested regulatory domain
|
|
* will always be used as a base for further regulatory
|
|
* settings
|
|
*/
|
|
chan->flags = chan->orig_flags =
|
|
map_regdom_flags(reg_rule->flags) | bw_flags;
|
|
chan->max_antenna_gain = chan->orig_mag =
|
|
(int) MBI_TO_DBI(power_rule->max_antenna_gain);
|
|
chan->max_reg_power = chan->max_power = chan->orig_mpwr =
|
|
(int) MBM_TO_DBM(power_rule->max_eirp);
|
|
|
|
if (chan->flags & IEEE80211_CHAN_RADAR) {
|
|
chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
|
|
if (reg_rule->dfs_cac_ms)
|
|
chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
chan->dfs_state = NL80211_DFS_USABLE;
|
|
chan->dfs_state_entered = jiffies;
|
|
|
|
chan->beacon_found = false;
|
|
chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
|
|
chan->max_antenna_gain =
|
|
min_t(int, chan->orig_mag,
|
|
MBI_TO_DBI(power_rule->max_antenna_gain));
|
|
chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
|
|
|
|
if (chan->flags & IEEE80211_CHAN_RADAR) {
|
|
if (reg_rule->dfs_cac_ms)
|
|
chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
|
|
else
|
|
chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
|
|
}
|
|
|
|
if (chan->orig_mpwr) {
|
|
/*
|
|
* Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
|
|
* will always follow the passed country IE power settings.
|
|
*/
|
|
if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
|
|
wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
|
|
chan->max_power = chan->max_reg_power;
|
|
else
|
|
chan->max_power = min(chan->orig_mpwr,
|
|
chan->max_reg_power);
|
|
} else
|
|
chan->max_power = chan->max_reg_power;
|
|
}
|
|
|
|
static void handle_channel_adjacent_rules(struct wiphy *wiphy,
|
|
enum nl80211_reg_initiator initiator,
|
|
struct ieee80211_channel *chan,
|
|
u32 flags,
|
|
struct regulatory_request *lr,
|
|
struct wiphy *request_wiphy,
|
|
const struct ieee80211_reg_rule *rrule1,
|
|
const struct ieee80211_reg_rule *rrule2,
|
|
struct ieee80211_freq_range *comb_range)
|
|
{
|
|
u32 bw_flags1 = 0;
|
|
u32 bw_flags2 = 0;
|
|
const struct ieee80211_power_rule *power_rule1 = NULL;
|
|
const struct ieee80211_power_rule *power_rule2 = NULL;
|
|
const struct ieee80211_regdomain *regd;
|
|
|
|
regd = reg_get_regdomain(wiphy);
|
|
|
|
power_rule1 = &rrule1->power_rule;
|
|
power_rule2 = &rrule2->power_rule;
|
|
bw_flags1 = reg_rule_to_chan_bw_flags(regd, rrule1, chan);
|
|
bw_flags2 = reg_rule_to_chan_bw_flags(regd, rrule2, chan);
|
|
|
|
if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
|
|
request_wiphy && request_wiphy == wiphy &&
|
|
request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
|
|
/* This guarantees the driver's requested regulatory domain
|
|
* will always be used as a base for further regulatory
|
|
* settings
|
|
*/
|
|
chan->flags =
|
|
map_regdom_flags(rrule1->flags) |
|
|
map_regdom_flags(rrule2->flags) |
|
|
bw_flags1 |
|
|
bw_flags2;
|
|
chan->orig_flags = chan->flags;
|
|
chan->max_antenna_gain =
|
|
min_t(int, MBI_TO_DBI(power_rule1->max_antenna_gain),
|
|
MBI_TO_DBI(power_rule2->max_antenna_gain));
|
|
chan->orig_mag = chan->max_antenna_gain;
|
|
chan->max_reg_power =
|
|
min_t(int, MBM_TO_DBM(power_rule1->max_eirp),
|
|
MBM_TO_DBM(power_rule2->max_eirp));
|
|
chan->max_power = chan->max_reg_power;
|
|
chan->orig_mpwr = chan->max_reg_power;
|
|
|
|
if (chan->flags & IEEE80211_CHAN_RADAR) {
|
|
chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
|
|
if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
|
|
chan->dfs_cac_ms = max_t(unsigned int,
|
|
rrule1->dfs_cac_ms,
|
|
rrule2->dfs_cac_ms);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
chan->dfs_state = NL80211_DFS_USABLE;
|
|
chan->dfs_state_entered = jiffies;
|
|
|
|
chan->beacon_found = false;
|
|
chan->flags = flags | bw_flags1 | bw_flags2 |
|
|
map_regdom_flags(rrule1->flags) |
|
|
map_regdom_flags(rrule2->flags);
|
|
|
|
/* reg_rule_to_chan_bw_flags may forbids 10 and forbids 20 MHz
|
|
* (otherwise no adj. rule case), recheck therefore
|
|
*/
|
|
if (cfg80211_does_bw_fit_range(comb_range,
|
|
ieee80211_channel_to_khz(chan),
|
|
MHZ_TO_KHZ(10)))
|
|
chan->flags &= ~IEEE80211_CHAN_NO_10MHZ;
|
|
if (cfg80211_does_bw_fit_range(comb_range,
|
|
ieee80211_channel_to_khz(chan),
|
|
MHZ_TO_KHZ(20)))
|
|
chan->flags &= ~IEEE80211_CHAN_NO_20MHZ;
|
|
|
|
chan->max_antenna_gain =
|
|
min_t(int, chan->orig_mag,
|
|
min_t(int,
|
|
MBI_TO_DBI(power_rule1->max_antenna_gain),
|
|
MBI_TO_DBI(power_rule2->max_antenna_gain)));
|
|
chan->max_reg_power = min_t(int,
|
|
MBM_TO_DBM(power_rule1->max_eirp),
|
|
MBM_TO_DBM(power_rule2->max_eirp));
|
|
|
|
if (chan->flags & IEEE80211_CHAN_RADAR) {
|
|
if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
|
|
chan->dfs_cac_ms = max_t(unsigned int,
|
|
rrule1->dfs_cac_ms,
|
|
rrule2->dfs_cac_ms);
|
|
else
|
|
chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
|
|
}
|
|
|
|
if (chan->orig_mpwr) {
|
|
/* Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
|
|
* will always follow the passed country IE power settings.
|
|
*/
|
|
if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
|
|
wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
|
|
chan->max_power = chan->max_reg_power;
|
|
else
|
|
chan->max_power = min(chan->orig_mpwr,
|
|
chan->max_reg_power);
|
|
} else {
|
|
chan->max_power = chan->max_reg_power;
|
|
}
|
|
}
|
|
|
|
/* Note that right now we assume the desired channel bandwidth
|
|
* is always 20 MHz for each individual channel (HT40 uses 20 MHz
|
|
* per channel, the primary and the extension channel).
|
|
*/
|
|
static void handle_channel(struct wiphy *wiphy,
|
|
enum nl80211_reg_initiator initiator,
|
|
struct ieee80211_channel *chan)
|
|
{
|
|
const u32 orig_chan_freq = ieee80211_channel_to_khz(chan);
|
|
struct regulatory_request *lr = get_last_request();
|
|
struct wiphy *request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
|
|
const struct ieee80211_reg_rule *rrule = NULL;
|
|
const struct ieee80211_reg_rule *rrule1 = NULL;
|
|
const struct ieee80211_reg_rule *rrule2 = NULL;
|
|
|
|
u32 flags = chan->orig_flags;
|
|
|
|
rrule = freq_reg_info(wiphy, orig_chan_freq);
|
|
if (IS_ERR(rrule)) {
|
|
/* check for adjacent match, therefore get rules for
|
|
* chan - 20 MHz and chan + 20 MHz and test
|
|
* if reg rules are adjacent
|
|
*/
|
|
rrule1 = freq_reg_info(wiphy,
|
|
orig_chan_freq - MHZ_TO_KHZ(20));
|
|
rrule2 = freq_reg_info(wiphy,
|
|
orig_chan_freq + MHZ_TO_KHZ(20));
|
|
if (!IS_ERR(rrule1) && !IS_ERR(rrule2)) {
|
|
struct ieee80211_freq_range comb_range;
|
|
|
|
if (rrule1->freq_range.end_freq_khz !=
|
|
rrule2->freq_range.start_freq_khz)
|
|
goto disable_chan;
|
|
|
|
comb_range.start_freq_khz =
|
|
rrule1->freq_range.start_freq_khz;
|
|
comb_range.end_freq_khz =
|
|
rrule2->freq_range.end_freq_khz;
|
|
comb_range.max_bandwidth_khz =
|
|
min_t(u32,
|
|
rrule1->freq_range.max_bandwidth_khz,
|
|
rrule2->freq_range.max_bandwidth_khz);
|
|
|
|
if (!cfg80211_does_bw_fit_range(&comb_range,
|
|
orig_chan_freq,
|
|
MHZ_TO_KHZ(20)))
|
|
goto disable_chan;
|
|
|
|
handle_channel_adjacent_rules(wiphy, initiator, chan,
|
|
flags, lr, request_wiphy,
|
|
rrule1, rrule2,
|
|
&comb_range);
|
|
return;
|
|
}
|
|
|
|
disable_chan:
|
|
/* We will disable all channels that do not match our
|
|
* received regulatory rule unless the hint is coming
|
|
* from a Country IE and the Country IE had no information
|
|
* about a band. The IEEE 802.11 spec allows for an AP
|
|
* to send only a subset of the regulatory rules allowed,
|
|
* so an AP in the US that only supports 2.4 GHz may only send
|
|
* a country IE with information for the 2.4 GHz band
|
|
* while 5 GHz is still supported.
|
|
*/
|
|
if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
|
|
PTR_ERR(rrule) == -ERANGE)
|
|
return;
|
|
|
|
if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
|
|
request_wiphy && request_wiphy == wiphy &&
|
|
request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
|
|
pr_debug("Disabling freq %d.%03d MHz for good\n",
|
|
chan->center_freq, chan->freq_offset);
|
|
chan->orig_flags |= IEEE80211_CHAN_DISABLED;
|
|
chan->flags = chan->orig_flags;
|
|
} else {
|
|
pr_debug("Disabling freq %d.%03d MHz\n",
|
|
chan->center_freq, chan->freq_offset);
|
|
chan->flags |= IEEE80211_CHAN_DISABLED;
|
|
}
|
|
return;
|
|
}
|
|
|
|
handle_channel_single_rule(wiphy, initiator, chan, flags, lr,
|
|
request_wiphy, rrule);
|
|
}
|
|
|
|
static void handle_band(struct wiphy *wiphy,
|
|
enum nl80211_reg_initiator initiator,
|
|
struct ieee80211_supported_band *sband)
|
|
{
|
|
unsigned int i;
|
|
|
|
if (!sband)
|
|
return;
|
|
|
|
for (i = 0; i < sband->n_channels; i++)
|
|
handle_channel(wiphy, initiator, &sband->channels[i]);
|
|
}
|
|
|
|
static bool reg_request_cell_base(struct regulatory_request *request)
|
|
{
|
|
if (request->initiator != NL80211_REGDOM_SET_BY_USER)
|
|
return false;
|
|
return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
|
|
}
|
|
|
|
bool reg_last_request_cell_base(void)
|
|
{
|
|
return reg_request_cell_base(get_last_request());
|
|
}
|
|
|
|
#ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
|
|
/* Core specific check */
|
|
static enum reg_request_treatment
|
|
reg_ignore_cell_hint(struct regulatory_request *pending_request)
|
|
{
|
|
struct regulatory_request *lr = get_last_request();
|
|
|
|
if (!reg_num_devs_support_basehint)
|
|
return REG_REQ_IGNORE;
|
|
|
|
if (reg_request_cell_base(lr) &&
|
|
!regdom_changes(pending_request->alpha2))
|
|
return REG_REQ_ALREADY_SET;
|
|
|
|
return REG_REQ_OK;
|
|
}
|
|
|
|
/* Device specific check */
|
|
static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
|
|
{
|
|
return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
|
|
}
|
|
#else
|
|
static enum reg_request_treatment
|
|
reg_ignore_cell_hint(struct regulatory_request *pending_request)
|
|
{
|
|
return REG_REQ_IGNORE;
|
|
}
|
|
|
|
static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
|
|
{
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
|
|
{
|
|
if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
|
|
!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static bool ignore_reg_update(struct wiphy *wiphy,
|
|
enum nl80211_reg_initiator initiator)
|
|
{
|
|
struct regulatory_request *lr = get_last_request();
|
|
|
|
if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
|
|
return true;
|
|
|
|
if (!lr) {
|
|
pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
|
|
reg_initiator_name(initiator));
|
|
return true;
|
|
}
|
|
|
|
if (initiator == NL80211_REGDOM_SET_BY_CORE &&
|
|
wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
|
|
pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
|
|
reg_initiator_name(initiator));
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* wiphy->regd will be set once the device has its own
|
|
* desired regulatory domain set
|
|
*/
|
|
if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
|
|
initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
|
|
!is_world_regdom(lr->alpha2)) {
|
|
pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n",
|
|
reg_initiator_name(initiator));
|
|
return true;
|
|
}
|
|
|
|
if (reg_request_cell_base(lr))
|
|
return reg_dev_ignore_cell_hint(wiphy);
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool reg_is_world_roaming(struct wiphy *wiphy)
|
|
{
|
|
const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
|
|
const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
|
|
struct regulatory_request *lr = get_last_request();
|
|
|
|
if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
|
|
return true;
|
|
|
|
if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
|
|
wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
|
|
struct reg_beacon *reg_beacon)
|
|
{
|
|
struct ieee80211_supported_band *sband;
|
|
struct ieee80211_channel *chan;
|
|
bool channel_changed = false;
|
|
struct ieee80211_channel chan_before;
|
|
|
|
sband = wiphy->bands[reg_beacon->chan.band];
|
|
chan = &sband->channels[chan_idx];
|
|
|
|
if (likely(!ieee80211_channel_equal(chan, ®_beacon->chan)))
|
|
return;
|
|
|
|
if (chan->beacon_found)
|
|
return;
|
|
|
|
chan->beacon_found = true;
|
|
|
|
if (!reg_is_world_roaming(wiphy))
|
|
return;
|
|
|
|
if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
|
|
return;
|
|
|
|
chan_before = *chan;
|
|
|
|
if (chan->flags & IEEE80211_CHAN_NO_IR) {
|
|
chan->flags &= ~IEEE80211_CHAN_NO_IR;
|
|
channel_changed = true;
|
|
}
|
|
|
|
if (channel_changed)
|
|
nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
|
|
}
|
|
|
|
/*
|
|
* Called when a scan on a wiphy finds a beacon on
|
|
* new channel
|
|
*/
|
|
static void wiphy_update_new_beacon(struct wiphy *wiphy,
|
|
struct reg_beacon *reg_beacon)
|
|
{
|
|
unsigned int i;
|
|
struct ieee80211_supported_band *sband;
|
|
|
|
if (!wiphy->bands[reg_beacon->chan.band])
|
|
return;
|
|
|
|
sband = wiphy->bands[reg_beacon->chan.band];
|
|
|
|
for (i = 0; i < sband->n_channels; i++)
|
|
handle_reg_beacon(wiphy, i, reg_beacon);
|
|
}
|
|
|
|
/*
|
|
* Called upon reg changes or a new wiphy is added
|
|
*/
|
|
static void wiphy_update_beacon_reg(struct wiphy *wiphy)
|
|
{
|
|
unsigned int i;
|
|
struct ieee80211_supported_band *sband;
|
|
struct reg_beacon *reg_beacon;
|
|
|
|
list_for_each_entry(reg_beacon, ®_beacon_list, list) {
|
|
if (!wiphy->bands[reg_beacon->chan.band])
|
|
continue;
|
|
sband = wiphy->bands[reg_beacon->chan.band];
|
|
for (i = 0; i < sband->n_channels; i++)
|
|
handle_reg_beacon(wiphy, i, reg_beacon);
|
|
}
|
|
}
|
|
|
|
/* Reap the advantages of previously found beacons */
|
|
static void reg_process_beacons(struct wiphy *wiphy)
|
|
{
|
|
/*
|
|
* Means we are just firing up cfg80211, so no beacons would
|
|
* have been processed yet.
|
|
*/
|
|
if (!last_request)
|
|
return;
|
|
wiphy_update_beacon_reg(wiphy);
|
|
}
|
|
|
|
static bool is_ht40_allowed(struct ieee80211_channel *chan)
|
|
{
|
|
if (!chan)
|
|
return false;
|
|
if (chan->flags & IEEE80211_CHAN_DISABLED)
|
|
return false;
|
|
/* This would happen when regulatory rules disallow HT40 completely */
|
|
if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
static void reg_process_ht_flags_channel(struct wiphy *wiphy,
|
|
struct ieee80211_channel *channel)
|
|
{
|
|
struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
|
|
struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
|
|
const struct ieee80211_regdomain *regd;
|
|
unsigned int i;
|
|
u32 flags;
|
|
|
|
if (!is_ht40_allowed(channel)) {
|
|
channel->flags |= IEEE80211_CHAN_NO_HT40;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* We need to ensure the extension channels exist to
|
|
* be able to use HT40- or HT40+, this finds them (or not)
|
|
*/
|
|
for (i = 0; i < sband->n_channels; i++) {
|
|
struct ieee80211_channel *c = &sband->channels[i];
|
|
|
|
if (c->center_freq == (channel->center_freq - 20))
|
|
channel_before = c;
|
|
if (c->center_freq == (channel->center_freq + 20))
|
|
channel_after = c;
|
|
}
|
|
|
|
flags = 0;
|
|
regd = get_wiphy_regdom(wiphy);
|
|
if (regd) {
|
|
const struct ieee80211_reg_rule *reg_rule =
|
|
freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq),
|
|
regd, MHZ_TO_KHZ(20));
|
|
|
|
if (!IS_ERR(reg_rule))
|
|
flags = reg_rule->flags;
|
|
}
|
|
|
|
/*
|
|
* Please note that this assumes target bandwidth is 20 MHz,
|
|
* if that ever changes we also need to change the below logic
|
|
* to include that as well.
|
|
*/
|
|
if (!is_ht40_allowed(channel_before) ||
|
|
flags & NL80211_RRF_NO_HT40MINUS)
|
|
channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
|
|
else
|
|
channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
|
|
|
|
if (!is_ht40_allowed(channel_after) ||
|
|
flags & NL80211_RRF_NO_HT40PLUS)
|
|
channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
|
|
else
|
|
channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
|
|
}
|
|
|
|
static void reg_process_ht_flags_band(struct wiphy *wiphy,
|
|
struct ieee80211_supported_band *sband)
|
|
{
|
|
unsigned int i;
|
|
|
|
if (!sband)
|
|
return;
|
|
|
|
for (i = 0; i < sband->n_channels; i++)
|
|
reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
|
|
}
|
|
|
|
static void reg_process_ht_flags(struct wiphy *wiphy)
|
|
{
|
|
enum nl80211_band band;
|
|
|
|
if (!wiphy)
|
|
return;
|
|
|
|
for (band = 0; band < NUM_NL80211_BANDS; band++)
|
|
reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
|
|
}
|
|
|
|
static void reg_call_notifier(struct wiphy *wiphy,
|
|
struct regulatory_request *request)
|
|
{
|
|
if (wiphy->reg_notifier)
|
|
wiphy->reg_notifier(wiphy, request);
|
|
}
|
|
|
|
static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
|
|
{
|
|
struct cfg80211_chan_def chandef = {};
|
|
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
|
|
enum nl80211_iftype iftype;
|
|
|
|
wdev_lock(wdev);
|
|
iftype = wdev->iftype;
|
|
|
|
/* make sure the interface is active */
|
|
if (!wdev->netdev || !netif_running(wdev->netdev))
|
|
goto wdev_inactive_unlock;
|
|
|
|
switch (iftype) {
|
|
case NL80211_IFTYPE_AP:
|
|
case NL80211_IFTYPE_P2P_GO:
|
|
if (!wdev->beacon_interval)
|
|
goto wdev_inactive_unlock;
|
|
chandef = wdev->chandef;
|
|
break;
|
|
case NL80211_IFTYPE_ADHOC:
|
|
if (!wdev->ssid_len)
|
|
goto wdev_inactive_unlock;
|
|
chandef = wdev->chandef;
|
|
break;
|
|
case NL80211_IFTYPE_STATION:
|
|
case NL80211_IFTYPE_P2P_CLIENT:
|
|
if (!wdev->current_bss ||
|
|
!wdev->current_bss->pub.channel)
|
|
goto wdev_inactive_unlock;
|
|
|
|
if (!rdev->ops->get_channel ||
|
|
rdev_get_channel(rdev, wdev, &chandef))
|
|
cfg80211_chandef_create(&chandef,
|
|
wdev->current_bss->pub.channel,
|
|
NL80211_CHAN_NO_HT);
|
|
break;
|
|
case NL80211_IFTYPE_MONITOR:
|
|
case NL80211_IFTYPE_AP_VLAN:
|
|
case NL80211_IFTYPE_P2P_DEVICE:
|
|
/* no enforcement required */
|
|
break;
|
|
default:
|
|
/* others not implemented for now */
|
|
WARN_ON(1);
|
|
break;
|
|
}
|
|
|
|
wdev_unlock(wdev);
|
|
|
|
switch (iftype) {
|
|
case NL80211_IFTYPE_AP:
|
|
case NL80211_IFTYPE_P2P_GO:
|
|
case NL80211_IFTYPE_ADHOC:
|
|
return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype);
|
|
case NL80211_IFTYPE_STATION:
|
|
case NL80211_IFTYPE_P2P_CLIENT:
|
|
return cfg80211_chandef_usable(wiphy, &chandef,
|
|
IEEE80211_CHAN_DISABLED);
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
|
|
wdev_inactive_unlock:
|
|
wdev_unlock(wdev);
|
|
return true;
|
|
}
|
|
|
|
static void reg_leave_invalid_chans(struct wiphy *wiphy)
|
|
{
|
|
struct wireless_dev *wdev;
|
|
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
|
|
|
|
ASSERT_RTNL();
|
|
|
|
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
|
|
if (!reg_wdev_chan_valid(wiphy, wdev))
|
|
cfg80211_leave(rdev, wdev);
|
|
}
|
|
|
|
static void reg_check_chans_work(struct work_struct *work)
|
|
{
|
|
struct cfg80211_registered_device *rdev;
|
|
|
|
pr_debug("Verifying active interfaces after reg change\n");
|
|
rtnl_lock();
|
|
|
|
list_for_each_entry(rdev, &cfg80211_rdev_list, list)
|
|
if (!(rdev->wiphy.regulatory_flags &
|
|
REGULATORY_IGNORE_STALE_KICKOFF))
|
|
reg_leave_invalid_chans(&rdev->wiphy);
|
|
|
|
rtnl_unlock();
|
|
}
|
|
|
|
static void reg_check_channels(void)
|
|
{
|
|
/*
|
|
* Give usermode a chance to do something nicer (move to another
|
|
* channel, orderly disconnection), before forcing a disconnection.
|
|
*/
|
|
mod_delayed_work(system_power_efficient_wq,
|
|
®_check_chans,
|
|
msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
|
|
}
|
|
|
|
static void wiphy_update_regulatory(struct wiphy *wiphy,
|
|
enum nl80211_reg_initiator initiator)
|
|
{
|
|
enum nl80211_band band;
|
|
struct regulatory_request *lr = get_last_request();
|
|
|
|
if (ignore_reg_update(wiphy, initiator)) {
|
|
/*
|
|
* Regulatory updates set by CORE are ignored for custom
|
|
* regulatory cards. Let us notify the changes to the driver,
|
|
* as some drivers used this to restore its orig_* reg domain.
|
|
*/
|
|
if (initiator == NL80211_REGDOM_SET_BY_CORE &&
|
|
wiphy->regulatory_flags & REGULATORY_CUSTOM_REG &&
|
|
!(wiphy->regulatory_flags &
|
|
REGULATORY_WIPHY_SELF_MANAGED))
|
|
reg_call_notifier(wiphy, lr);
|
|
return;
|
|
}
|
|
|
|
lr->dfs_region = get_cfg80211_regdom()->dfs_region;
|
|
|
|
for (band = 0; band < NUM_NL80211_BANDS; band++)
|
|
handle_band(wiphy, initiator, wiphy->bands[band]);
|
|
|
|
reg_process_beacons(wiphy);
|
|
reg_process_ht_flags(wiphy);
|
|
reg_call_notifier(wiphy, lr);
|
|
}
|
|
|
|
static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
|
|
{
|
|
struct cfg80211_registered_device *rdev;
|
|
struct wiphy *wiphy;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
|
|
wiphy = &rdev->wiphy;
|
|
wiphy_update_regulatory(wiphy, initiator);
|
|
}
|
|
|
|
reg_check_channels();
|
|
}
|
|
|
|
static void handle_channel_custom(struct wiphy *wiphy,
|
|
struct ieee80211_channel *chan,
|
|
const struct ieee80211_regdomain *regd,
|
|
u32 min_bw)
|
|
{
|
|
u32 bw_flags = 0;
|
|
const struct ieee80211_reg_rule *reg_rule = NULL;
|
|
const struct ieee80211_power_rule *power_rule = NULL;
|
|
u32 bw, center_freq_khz;
|
|
|
|
center_freq_khz = ieee80211_channel_to_khz(chan);
|
|
for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
|
|
reg_rule = freq_reg_info_regd(center_freq_khz, regd, bw);
|
|
if (!IS_ERR(reg_rule))
|
|
break;
|
|
}
|
|
|
|
if (IS_ERR_OR_NULL(reg_rule)) {
|
|
pr_debug("Disabling freq %d.%03d MHz as custom regd has no rule that fits it\n",
|
|
chan->center_freq, chan->freq_offset);
|
|
if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
|
|
chan->flags |= IEEE80211_CHAN_DISABLED;
|
|
} else {
|
|
chan->orig_flags |= IEEE80211_CHAN_DISABLED;
|
|
chan->flags = chan->orig_flags;
|
|
}
|
|
return;
|
|
}
|
|
|
|
power_rule = ®_rule->power_rule;
|
|
bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
|
|
|
|
chan->dfs_state_entered = jiffies;
|
|
chan->dfs_state = NL80211_DFS_USABLE;
|
|
|
|
chan->beacon_found = false;
|
|
|
|
if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
|
|
chan->flags = chan->orig_flags | bw_flags |
|
|
map_regdom_flags(reg_rule->flags);
|
|
else
|
|
chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
|
|
|
|
chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
|
|
chan->max_reg_power = chan->max_power =
|
|
(int) MBM_TO_DBM(power_rule->max_eirp);
|
|
|
|
if (chan->flags & IEEE80211_CHAN_RADAR) {
|
|
if (reg_rule->dfs_cac_ms)
|
|
chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
|
|
else
|
|
chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
|
|
}
|
|
|
|
chan->max_power = chan->max_reg_power;
|
|
}
|
|
|
|
static void handle_band_custom(struct wiphy *wiphy,
|
|
struct ieee80211_supported_band *sband,
|
|
const struct ieee80211_regdomain *regd)
|
|
{
|
|
unsigned int i;
|
|
|
|
if (!sband)
|
|
return;
|
|
|
|
/*
|
|
* We currently assume that you always want at least 20 MHz,
|
|
* otherwise channel 12 might get enabled if this rule is
|
|
* compatible to US, which permits 2402 - 2472 MHz.
|
|
*/
|
|
for (i = 0; i < sband->n_channels; i++)
|
|
handle_channel_custom(wiphy, &sband->channels[i], regd,
|
|
MHZ_TO_KHZ(20));
|
|
}
|
|
|
|
/* Used by drivers prior to wiphy registration */
|
|
void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
|
|
const struct ieee80211_regdomain *regd)
|
|
{
|
|
const struct ieee80211_regdomain *new_regd, *tmp;
|
|
enum nl80211_band band;
|
|
unsigned int bands_set = 0;
|
|
|
|
WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
|
|
"wiphy should have REGULATORY_CUSTOM_REG\n");
|
|
wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
|
|
|
|
for (band = 0; band < NUM_NL80211_BANDS; band++) {
|
|
if (!wiphy->bands[band])
|
|
continue;
|
|
handle_band_custom(wiphy, wiphy->bands[band], regd);
|
|
bands_set++;
|
|
}
|
|
|
|
/*
|
|
* no point in calling this if it won't have any effect
|
|
* on your device's supported bands.
|
|
*/
|
|
WARN_ON(!bands_set);
|
|
new_regd = reg_copy_regd(regd);
|
|
if (IS_ERR(new_regd))
|
|
return;
|
|
|
|
rtnl_lock();
|
|
|
|
tmp = get_wiphy_regdom(wiphy);
|
|
rcu_assign_pointer(wiphy->regd, new_regd);
|
|
rcu_free_regdom(tmp);
|
|
|
|
rtnl_unlock();
|
|
}
|
|
EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
|
|
|
|
static void reg_set_request_processed(void)
|
|
{
|
|
bool need_more_processing = false;
|
|
struct regulatory_request *lr = get_last_request();
|
|
|
|
lr->processed = true;
|
|
|
|
spin_lock(®_requests_lock);
|
|
if (!list_empty(®_requests_list))
|
|
need_more_processing = true;
|
|
spin_unlock(®_requests_lock);
|
|
|
|
cancel_crda_timeout();
|
|
|
|
if (need_more_processing)
|
|
schedule_work(®_work);
|
|
}
|
|
|
|
/**
|
|
* reg_process_hint_core - process core regulatory requests
|
|
* @core_request: a pending core regulatory request
|
|
*
|
|
* The wireless subsystem can use this function to process
|
|
* a regulatory request issued by the regulatory core.
|
|
*/
|
|
static enum reg_request_treatment
|
|
reg_process_hint_core(struct regulatory_request *core_request)
|
|
{
|
|
if (reg_query_database(core_request)) {
|
|
core_request->intersect = false;
|
|
core_request->processed = false;
|
|
reg_update_last_request(core_request);
|
|
return REG_REQ_OK;
|
|
}
|
|
|
|
return REG_REQ_IGNORE;
|
|
}
|
|
|
|
static enum reg_request_treatment
|
|
__reg_process_hint_user(struct regulatory_request *user_request)
|
|
{
|
|
struct regulatory_request *lr = get_last_request();
|
|
|
|
if (reg_request_cell_base(user_request))
|
|
return reg_ignore_cell_hint(user_request);
|
|
|
|
if (reg_request_cell_base(lr))
|
|
return REG_REQ_IGNORE;
|
|
|
|
if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
|
|
return REG_REQ_INTERSECT;
|
|
/*
|
|
* If the user knows better the user should set the regdom
|
|
* to their country before the IE is picked up
|
|
*/
|
|
if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
|
|
lr->intersect)
|
|
return REG_REQ_IGNORE;
|
|
/*
|
|
* Process user requests only after previous user/driver/core
|
|
* requests have been processed
|
|
*/
|
|
if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
|
|
lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
|
|
lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
|
|
regdom_changes(lr->alpha2))
|
|
return REG_REQ_IGNORE;
|
|
|
|
if (!regdom_changes(user_request->alpha2))
|
|
return REG_REQ_ALREADY_SET;
|
|
|
|
return REG_REQ_OK;
|
|
}
|
|
|
|
/**
|
|
* reg_process_hint_user - process user regulatory requests
|
|
* @user_request: a pending user regulatory request
|
|
*
|
|
* The wireless subsystem can use this function to process
|
|
* a regulatory request initiated by userspace.
|
|
*/
|
|
static enum reg_request_treatment
|
|
reg_process_hint_user(struct regulatory_request *user_request)
|
|
{
|
|
enum reg_request_treatment treatment;
|
|
|
|
treatment = __reg_process_hint_user(user_request);
|
|
if (treatment == REG_REQ_IGNORE ||
|
|
treatment == REG_REQ_ALREADY_SET)
|
|
return REG_REQ_IGNORE;
|
|
|
|
user_request->intersect = treatment == REG_REQ_INTERSECT;
|
|
user_request->processed = false;
|
|
|
|
if (reg_query_database(user_request)) {
|
|
reg_update_last_request(user_request);
|
|
user_alpha2[0] = user_request->alpha2[0];
|
|
user_alpha2[1] = user_request->alpha2[1];
|
|
return REG_REQ_OK;
|
|
}
|
|
|
|
return REG_REQ_IGNORE;
|
|
}
|
|
|
|
static enum reg_request_treatment
|
|
__reg_process_hint_driver(struct regulatory_request *driver_request)
|
|
{
|
|
struct regulatory_request *lr = get_last_request();
|
|
|
|
if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
|
|
if (regdom_changes(driver_request->alpha2))
|
|
return REG_REQ_OK;
|
|
return REG_REQ_ALREADY_SET;
|
|
}
|
|
|
|
/*
|
|
* This would happen if you unplug and plug your card
|
|
* back in or if you add a new device for which the previously
|
|
* loaded card also agrees on the regulatory domain.
|
|
*/
|
|
if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
|
|
!regdom_changes(driver_request->alpha2))
|
|
return REG_REQ_ALREADY_SET;
|
|
|
|
return REG_REQ_INTERSECT;
|
|
}
|
|
|
|
/**
|
|
* reg_process_hint_driver - process driver regulatory requests
|
|
* @wiphy: the wireless device for the regulatory request
|
|
* @driver_request: a pending driver regulatory request
|
|
*
|
|
* The wireless subsystem can use this function to process
|
|
* a regulatory request issued by an 802.11 driver.
|
|
*
|
|
* Returns one of the different reg request treatment values.
|
|
*/
|
|
static enum reg_request_treatment
|
|
reg_process_hint_driver(struct wiphy *wiphy,
|
|
struct regulatory_request *driver_request)
|
|
{
|
|
const struct ieee80211_regdomain *regd, *tmp;
|
|
enum reg_request_treatment treatment;
|
|
|
|
treatment = __reg_process_hint_driver(driver_request);
|
|
|
|
switch (treatment) {
|
|
case REG_REQ_OK:
|
|
break;
|
|
case REG_REQ_IGNORE:
|
|
return REG_REQ_IGNORE;
|
|
case REG_REQ_INTERSECT:
|
|
case REG_REQ_ALREADY_SET:
|
|
regd = reg_copy_regd(get_cfg80211_regdom());
|
|
if (IS_ERR(regd))
|
|
return REG_REQ_IGNORE;
|
|
|
|
tmp = get_wiphy_regdom(wiphy);
|
|
rcu_assign_pointer(wiphy->regd, regd);
|
|
rcu_free_regdom(tmp);
|
|
}
|
|
|
|
|
|
driver_request->intersect = treatment == REG_REQ_INTERSECT;
|
|
driver_request->processed = false;
|
|
|
|
/*
|
|
* Since CRDA will not be called in this case as we already
|
|
* have applied the requested regulatory domain before we just
|
|
* inform userspace we have processed the request
|
|
*/
|
|
if (treatment == REG_REQ_ALREADY_SET) {
|
|
nl80211_send_reg_change_event(driver_request);
|
|
reg_update_last_request(driver_request);
|
|
reg_set_request_processed();
|
|
return REG_REQ_ALREADY_SET;
|
|
}
|
|
|
|
if (reg_query_database(driver_request)) {
|
|
reg_update_last_request(driver_request);
|
|
return REG_REQ_OK;
|
|
}
|
|
|
|
return REG_REQ_IGNORE;
|
|
}
|
|
|
|
static enum reg_request_treatment
|
|
__reg_process_hint_country_ie(struct wiphy *wiphy,
|
|
struct regulatory_request *country_ie_request)
|
|
{
|
|
struct wiphy *last_wiphy = NULL;
|
|
struct regulatory_request *lr = get_last_request();
|
|
|
|
if (reg_request_cell_base(lr)) {
|
|
/* Trust a Cell base station over the AP's country IE */
|
|
if (regdom_changes(country_ie_request->alpha2))
|
|
return REG_REQ_IGNORE;
|
|
return REG_REQ_ALREADY_SET;
|
|
} else {
|
|
if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
|
|
return REG_REQ_IGNORE;
|
|
}
|
|
|
|
if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
|
|
return -EINVAL;
|
|
|
|
if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
|
|
return REG_REQ_OK;
|
|
|
|
last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
|
|
|
|
if (last_wiphy != wiphy) {
|
|
/*
|
|
* Two cards with two APs claiming different
|
|
* Country IE alpha2s. We could
|
|
* intersect them, but that seems unlikely
|
|
* to be correct. Reject second one for now.
|
|
*/
|
|
if (regdom_changes(country_ie_request->alpha2))
|
|
return REG_REQ_IGNORE;
|
|
return REG_REQ_ALREADY_SET;
|
|
}
|
|
|
|
if (regdom_changes(country_ie_request->alpha2))
|
|
return REG_REQ_OK;
|
|
return REG_REQ_ALREADY_SET;
|
|
}
|
|
|
|
/**
|
|
* reg_process_hint_country_ie - process regulatory requests from country IEs
|
|
* @wiphy: the wireless device for the regulatory request
|
|
* @country_ie_request: a regulatory request from a country IE
|
|
*
|
|
* The wireless subsystem can use this function to process
|
|
* a regulatory request issued by a country Information Element.
|
|
*
|
|
* Returns one of the different reg request treatment values.
|
|
*/
|
|
static enum reg_request_treatment
|
|
reg_process_hint_country_ie(struct wiphy *wiphy,
|
|
struct regulatory_request *country_ie_request)
|
|
{
|
|
enum reg_request_treatment treatment;
|
|
|
|
treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
|
|
|
|
switch (treatment) {
|
|
case REG_REQ_OK:
|
|
break;
|
|
case REG_REQ_IGNORE:
|
|
return REG_REQ_IGNORE;
|
|
case REG_REQ_ALREADY_SET:
|
|
reg_free_request(country_ie_request);
|
|
return REG_REQ_ALREADY_SET;
|
|
case REG_REQ_INTERSECT:
|
|
/*
|
|
* This doesn't happen yet, not sure we
|
|
* ever want to support it for this case.
|
|
*/
|
|
WARN_ONCE(1, "Unexpected intersection for country elements");
|
|
return REG_REQ_IGNORE;
|
|
}
|
|
|
|
country_ie_request->intersect = false;
|
|
country_ie_request->processed = false;
|
|
|
|
if (reg_query_database(country_ie_request)) {
|
|
reg_update_last_request(country_ie_request);
|
|
return REG_REQ_OK;
|
|
}
|
|
|
|
return REG_REQ_IGNORE;
|
|
}
|
|
|
|
bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2)
|
|
{
|
|
const struct ieee80211_regdomain *wiphy1_regd = NULL;
|
|
const struct ieee80211_regdomain *wiphy2_regd = NULL;
|
|
const struct ieee80211_regdomain *cfg80211_regd = NULL;
|
|
bool dfs_domain_same;
|
|
|
|
rcu_read_lock();
|
|
|
|
cfg80211_regd = rcu_dereference(cfg80211_regdomain);
|
|
wiphy1_regd = rcu_dereference(wiphy1->regd);
|
|
if (!wiphy1_regd)
|
|
wiphy1_regd = cfg80211_regd;
|
|
|
|
wiphy2_regd = rcu_dereference(wiphy2->regd);
|
|
if (!wiphy2_regd)
|
|
wiphy2_regd = cfg80211_regd;
|
|
|
|
dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region;
|
|
|
|
rcu_read_unlock();
|
|
|
|
return dfs_domain_same;
|
|
}
|
|
|
|
static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan,
|
|
struct ieee80211_channel *src_chan)
|
|
{
|
|
if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) ||
|
|
!(src_chan->flags & IEEE80211_CHAN_RADAR))
|
|
return;
|
|
|
|
if (dst_chan->flags & IEEE80211_CHAN_DISABLED ||
|
|
src_chan->flags & IEEE80211_CHAN_DISABLED)
|
|
return;
|
|
|
|
if (src_chan->center_freq == dst_chan->center_freq &&
|
|
dst_chan->dfs_state == NL80211_DFS_USABLE) {
|
|
dst_chan->dfs_state = src_chan->dfs_state;
|
|
dst_chan->dfs_state_entered = src_chan->dfs_state_entered;
|
|
}
|
|
}
|
|
|
|
static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy,
|
|
struct wiphy *src_wiphy)
|
|
{
|
|
struct ieee80211_supported_band *src_sband, *dst_sband;
|
|
struct ieee80211_channel *src_chan, *dst_chan;
|
|
int i, j, band;
|
|
|
|
if (!reg_dfs_domain_same(dst_wiphy, src_wiphy))
|
|
return;
|
|
|
|
for (band = 0; band < NUM_NL80211_BANDS; band++) {
|
|
dst_sband = dst_wiphy->bands[band];
|
|
src_sband = src_wiphy->bands[band];
|
|
if (!dst_sband || !src_sband)
|
|
continue;
|
|
|
|
for (i = 0; i < dst_sband->n_channels; i++) {
|
|
dst_chan = &dst_sband->channels[i];
|
|
for (j = 0; j < src_sband->n_channels; j++) {
|
|
src_chan = &src_sband->channels[j];
|
|
reg_copy_dfs_chan_state(dst_chan, src_chan);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy)
|
|
{
|
|
struct cfg80211_registered_device *rdev;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
|
|
if (wiphy == &rdev->wiphy)
|
|
continue;
|
|
wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy);
|
|
}
|
|
}
|
|
|
|
/* This processes *all* regulatory hints */
|
|
static void reg_process_hint(struct regulatory_request *reg_request)
|
|
{
|
|
struct wiphy *wiphy = NULL;
|
|
enum reg_request_treatment treatment;
|
|
enum nl80211_reg_initiator initiator = reg_request->initiator;
|
|
|
|
if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
|
|
wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
|
|
|
|
switch (initiator) {
|
|
case NL80211_REGDOM_SET_BY_CORE:
|
|
treatment = reg_process_hint_core(reg_request);
|
|
break;
|
|
case NL80211_REGDOM_SET_BY_USER:
|
|
treatment = reg_process_hint_user(reg_request);
|
|
break;
|
|
case NL80211_REGDOM_SET_BY_DRIVER:
|
|
if (!wiphy)
|
|
goto out_free;
|
|
treatment = reg_process_hint_driver(wiphy, reg_request);
|
|
break;
|
|
case NL80211_REGDOM_SET_BY_COUNTRY_IE:
|
|
if (!wiphy)
|
|
goto out_free;
|
|
treatment = reg_process_hint_country_ie(wiphy, reg_request);
|
|
break;
|
|
default:
|
|
WARN(1, "invalid initiator %d\n", initiator);
|
|
goto out_free;
|
|
}
|
|
|
|
if (treatment == REG_REQ_IGNORE)
|
|
goto out_free;
|
|
|
|
WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET,
|
|
"unexpected treatment value %d\n", treatment);
|
|
|
|
/* This is required so that the orig_* parameters are saved.
|
|
* NOTE: treatment must be set for any case that reaches here!
|
|
*/
|
|
if (treatment == REG_REQ_ALREADY_SET && wiphy &&
|
|
wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
|
|
wiphy_update_regulatory(wiphy, initiator);
|
|
wiphy_all_share_dfs_chan_state(wiphy);
|
|
reg_check_channels();
|
|
}
|
|
|
|
return;
|
|
|
|
out_free:
|
|
reg_free_request(reg_request);
|
|
}
|
|
|
|
static void notify_self_managed_wiphys(struct regulatory_request *request)
|
|
{
|
|
struct cfg80211_registered_device *rdev;
|
|
struct wiphy *wiphy;
|
|
|
|
list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
|
|
wiphy = &rdev->wiphy;
|
|
if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
|
|
request->initiator == NL80211_REGDOM_SET_BY_USER)
|
|
reg_call_notifier(wiphy, request);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
|
|
* Regulatory hints come on a first come first serve basis and we
|
|
* must process each one atomically.
|
|
*/
|
|
static void reg_process_pending_hints(void)
|
|
{
|
|
struct regulatory_request *reg_request, *lr;
|
|
|
|
lr = get_last_request();
|
|
|
|
/* When last_request->processed becomes true this will be rescheduled */
|
|
if (lr && !lr->processed) {
|
|
pr_debug("Pending regulatory request, waiting for it to be processed...\n");
|
|
return;
|
|
}
|
|
|
|
spin_lock(®_requests_lock);
|
|
|
|
if (list_empty(®_requests_list)) {
|
|
spin_unlock(®_requests_lock);
|
|
return;
|
|
}
|
|
|
|
reg_request = list_first_entry(®_requests_list,
|
|
struct regulatory_request,
|
|
list);
|
|
list_del_init(®_request->list);
|
|
|
|
spin_unlock(®_requests_lock);
|
|
|
|
notify_self_managed_wiphys(reg_request);
|
|
|
|
reg_process_hint(reg_request);
|
|
|
|
lr = get_last_request();
|
|
|
|
spin_lock(®_requests_lock);
|
|
if (!list_empty(®_requests_list) && lr && lr->processed)
|
|
schedule_work(®_work);
|
|
spin_unlock(®_requests_lock);
|
|
}
|
|
|
|
/* Processes beacon hints -- this has nothing to do with country IEs */
|
|
static void reg_process_pending_beacon_hints(void)
|
|
{
|
|
struct cfg80211_registered_device *rdev;
|
|
struct reg_beacon *pending_beacon, *tmp;
|
|
|
|
/* This goes through the _pending_ beacon list */
|
|
spin_lock_bh(®_pending_beacons_lock);
|
|
|
|
list_for_each_entry_safe(pending_beacon, tmp,
|
|
®_pending_beacons, list) {
|
|
list_del_init(&pending_beacon->list);
|
|
|
|
/* Applies the beacon hint to current wiphys */
|
|
list_for_each_entry(rdev, &cfg80211_rdev_list, list)
|
|
wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
|
|
|
|
/* Remembers the beacon hint for new wiphys or reg changes */
|
|
list_add_tail(&pending_beacon->list, ®_beacon_list);
|
|
}
|
|
|
|
spin_unlock_bh(®_pending_beacons_lock);
|
|
}
|
|
|
|
static void reg_process_self_managed_hints(void)
|
|
{
|
|
struct cfg80211_registered_device *rdev;
|
|
struct wiphy *wiphy;
|
|
const struct ieee80211_regdomain *tmp;
|
|
const struct ieee80211_regdomain *regd;
|
|
enum nl80211_band band;
|
|
struct regulatory_request request = {};
|
|
|
|
list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
|
|
wiphy = &rdev->wiphy;
|
|
|
|
spin_lock(®_requests_lock);
|
|
regd = rdev->requested_regd;
|
|
rdev->requested_regd = NULL;
|
|
spin_unlock(®_requests_lock);
|
|
|
|
if (regd == NULL)
|
|
continue;
|
|
|
|
tmp = get_wiphy_regdom(wiphy);
|
|
rcu_assign_pointer(wiphy->regd, regd);
|
|
rcu_free_regdom(tmp);
|
|
|
|
for (band = 0; band < NUM_NL80211_BANDS; band++)
|
|
handle_band_custom(wiphy, wiphy->bands[band], regd);
|
|
|
|
reg_process_ht_flags(wiphy);
|
|
|
|
request.wiphy_idx = get_wiphy_idx(wiphy);
|
|
request.alpha2[0] = regd->alpha2[0];
|
|
request.alpha2[1] = regd->alpha2[1];
|
|
request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
|
|
|
|
nl80211_send_wiphy_reg_change_event(&request);
|
|
}
|
|
|
|
reg_check_channels();
|
|
}
|
|
|
|
static void reg_todo(struct work_struct *work)
|
|
{
|
|
rtnl_lock();
|
|
reg_process_pending_hints();
|
|
reg_process_pending_beacon_hints();
|
|
reg_process_self_managed_hints();
|
|
rtnl_unlock();
|
|
}
|
|
|
|
static void queue_regulatory_request(struct regulatory_request *request)
|
|
{
|
|
request->alpha2[0] = toupper(request->alpha2[0]);
|
|
request->alpha2[1] = toupper(request->alpha2[1]);
|
|
|
|
spin_lock(®_requests_lock);
|
|
list_add_tail(&request->list, ®_requests_list);
|
|
spin_unlock(®_requests_lock);
|
|
|
|
schedule_work(®_work);
|
|
}
|
|
|
|
/*
|
|
* Core regulatory hint -- happens during cfg80211_init()
|
|
* and when we restore regulatory settings.
|
|
*/
|
|
static int regulatory_hint_core(const char *alpha2)
|
|
{
|
|
struct regulatory_request *request;
|
|
|
|
request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
|
|
if (!request)
|
|
return -ENOMEM;
|
|
|
|
request->alpha2[0] = alpha2[0];
|
|
request->alpha2[1] = alpha2[1];
|
|
request->initiator = NL80211_REGDOM_SET_BY_CORE;
|
|
request->wiphy_idx = WIPHY_IDX_INVALID;
|
|
|
|
queue_regulatory_request(request);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* User hints */
|
|
int regulatory_hint_user(const char *alpha2,
|
|
enum nl80211_user_reg_hint_type user_reg_hint_type)
|
|
{
|
|
struct regulatory_request *request;
|
|
|
|
if (WARN_ON(!alpha2))
|
|
return -EINVAL;
|
|
|
|
if (!is_world_regdom(alpha2) && !is_an_alpha2(alpha2))
|
|
return -EINVAL;
|
|
|
|
request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
|
|
if (!request)
|
|
return -ENOMEM;
|
|
|
|
request->wiphy_idx = WIPHY_IDX_INVALID;
|
|
request->alpha2[0] = alpha2[0];
|
|
request->alpha2[1] = alpha2[1];
|
|
request->initiator = NL80211_REGDOM_SET_BY_USER;
|
|
request->user_reg_hint_type = user_reg_hint_type;
|
|
|
|
/* Allow calling CRDA again */
|
|
reset_crda_timeouts();
|
|
|
|
queue_regulatory_request(request);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int regulatory_hint_indoor(bool is_indoor, u32 portid)
|
|
{
|
|
spin_lock(®_indoor_lock);
|
|
|
|
/* It is possible that more than one user space process is trying to
|
|
* configure the indoor setting. To handle such cases, clear the indoor
|
|
* setting in case that some process does not think that the device
|
|
* is operating in an indoor environment. In addition, if a user space
|
|
* process indicates that it is controlling the indoor setting, save its
|
|
* portid, i.e., make it the owner.
|
|
*/
|
|
reg_is_indoor = is_indoor;
|
|
if (reg_is_indoor) {
|
|
if (!reg_is_indoor_portid)
|
|
reg_is_indoor_portid = portid;
|
|
} else {
|
|
reg_is_indoor_portid = 0;
|
|
}
|
|
|
|
spin_unlock(®_indoor_lock);
|
|
|
|
if (!is_indoor)
|
|
reg_check_channels();
|
|
|
|
return 0;
|
|
}
|
|
|
|
void regulatory_netlink_notify(u32 portid)
|
|
{
|
|
spin_lock(®_indoor_lock);
|
|
|
|
if (reg_is_indoor_portid != portid) {
|
|
spin_unlock(®_indoor_lock);
|
|
return;
|
|
}
|
|
|
|
reg_is_indoor = false;
|
|
reg_is_indoor_portid = 0;
|
|
|
|
spin_unlock(®_indoor_lock);
|
|
|
|
reg_check_channels();
|
|
}
|
|
|
|
/* Driver hints */
|
|
int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
|
|
{
|
|
struct regulatory_request *request;
|
|
|
|
if (WARN_ON(!alpha2 || !wiphy))
|
|
return -EINVAL;
|
|
|
|
wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
|
|
|
|
request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
|
|
if (!request)
|
|
return -ENOMEM;
|
|
|
|
request->wiphy_idx = get_wiphy_idx(wiphy);
|
|
|
|
request->alpha2[0] = alpha2[0];
|
|
request->alpha2[1] = alpha2[1];
|
|
request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
|
|
|
|
/* Allow calling CRDA again */
|
|
reset_crda_timeouts();
|
|
|
|
queue_regulatory_request(request);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(regulatory_hint);
|
|
|
|
void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band,
|
|
const u8 *country_ie, u8 country_ie_len)
|
|
{
|
|
char alpha2[2];
|
|
enum environment_cap env = ENVIRON_ANY;
|
|
struct regulatory_request *request = NULL, *lr;
|
|
|
|
/* IE len must be evenly divisible by 2 */
|
|
if (country_ie_len & 0x01)
|
|
return;
|
|
|
|
if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
|
|
return;
|
|
|
|
request = kzalloc(sizeof(*request), GFP_KERNEL);
|
|
if (!request)
|
|
return;
|
|
|
|
alpha2[0] = country_ie[0];
|
|
alpha2[1] = country_ie[1];
|
|
|
|
if (country_ie[2] == 'I')
|
|
env = ENVIRON_INDOOR;
|
|
else if (country_ie[2] == 'O')
|
|
env = ENVIRON_OUTDOOR;
|
|
|
|
rcu_read_lock();
|
|
lr = get_last_request();
|
|
|
|
if (unlikely(!lr))
|
|
goto out;
|
|
|
|
/*
|
|
* We will run this only upon a successful connection on cfg80211.
|
|
* We leave conflict resolution to the workqueue, where can hold
|
|
* the RTNL.
|
|
*/
|
|
if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
|
|
lr->wiphy_idx != WIPHY_IDX_INVALID)
|
|
goto out;
|
|
|
|
request->wiphy_idx = get_wiphy_idx(wiphy);
|
|
request->alpha2[0] = alpha2[0];
|
|
request->alpha2[1] = alpha2[1];
|
|
request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
|
|
request->country_ie_env = env;
|
|
|
|
/* Allow calling CRDA again */
|
|
reset_crda_timeouts();
|
|
|
|
queue_regulatory_request(request);
|
|
request = NULL;
|
|
out:
|
|
kfree(request);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static void restore_alpha2(char *alpha2, bool reset_user)
|
|
{
|
|
/* indicates there is no alpha2 to consider for restoration */
|
|
alpha2[0] = '9';
|
|
alpha2[1] = '7';
|
|
|
|
/* The user setting has precedence over the module parameter */
|
|
if (is_user_regdom_saved()) {
|
|
/* Unless we're asked to ignore it and reset it */
|
|
if (reset_user) {
|
|
pr_debug("Restoring regulatory settings including user preference\n");
|
|
user_alpha2[0] = '9';
|
|
user_alpha2[1] = '7';
|
|
|
|
/*
|
|
* If we're ignoring user settings, we still need to
|
|
* check the module parameter to ensure we put things
|
|
* back as they were for a full restore.
|
|
*/
|
|
if (!is_world_regdom(ieee80211_regdom)) {
|
|
pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
|
|
ieee80211_regdom[0], ieee80211_regdom[1]);
|
|
alpha2[0] = ieee80211_regdom[0];
|
|
alpha2[1] = ieee80211_regdom[1];
|
|
}
|
|
} else {
|
|
pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n",
|
|
user_alpha2[0], user_alpha2[1]);
|
|
alpha2[0] = user_alpha2[0];
|
|
alpha2[1] = user_alpha2[1];
|
|
}
|
|
} else if (!is_world_regdom(ieee80211_regdom)) {
|
|
pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
|
|
ieee80211_regdom[0], ieee80211_regdom[1]);
|
|
alpha2[0] = ieee80211_regdom[0];
|
|
alpha2[1] = ieee80211_regdom[1];
|
|
} else
|
|
pr_debug("Restoring regulatory settings\n");
|
|
}
|
|
|
|
static void restore_custom_reg_settings(struct wiphy *wiphy)
|
|
{
|
|
struct ieee80211_supported_band *sband;
|
|
enum nl80211_band band;
|
|
struct ieee80211_channel *chan;
|
|
int i;
|
|
|
|
for (band = 0; band < NUM_NL80211_BANDS; band++) {
|
|
sband = wiphy->bands[band];
|
|
if (!sband)
|
|
continue;
|
|
for (i = 0; i < sband->n_channels; i++) {
|
|
chan = &sband->channels[i];
|
|
chan->flags = chan->orig_flags;
|
|
chan->max_antenna_gain = chan->orig_mag;
|
|
chan->max_power = chan->orig_mpwr;
|
|
chan->beacon_found = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Restoring regulatory settings involves ingoring any
|
|
* possibly stale country IE information and user regulatory
|
|
* settings if so desired, this includes any beacon hints
|
|
* learned as we could have traveled outside to another country
|
|
* after disconnection. To restore regulatory settings we do
|
|
* exactly what we did at bootup:
|
|
*
|
|
* - send a core regulatory hint
|
|
* - send a user regulatory hint if applicable
|
|
*
|
|
* Device drivers that send a regulatory hint for a specific country
|
|
* keep their own regulatory domain on wiphy->regd so that does
|
|
* not need to be remembered.
|
|
*/
|
|
static void restore_regulatory_settings(bool reset_user, bool cached)
|
|
{
|
|
char alpha2[2];
|
|
char world_alpha2[2];
|
|
struct reg_beacon *reg_beacon, *btmp;
|
|
LIST_HEAD(tmp_reg_req_list);
|
|
struct cfg80211_registered_device *rdev;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
/*
|
|
* Clear the indoor setting in case that it is not controlled by user
|
|
* space, as otherwise there is no guarantee that the device is still
|
|
* operating in an indoor environment.
|
|
*/
|
|
spin_lock(®_indoor_lock);
|
|
if (reg_is_indoor && !reg_is_indoor_portid) {
|
|
reg_is_indoor = false;
|
|
reg_check_channels();
|
|
}
|
|
spin_unlock(®_indoor_lock);
|
|
|
|
reset_regdomains(true, &world_regdom);
|
|
restore_alpha2(alpha2, reset_user);
|
|
|
|
/*
|
|
* If there's any pending requests we simply
|
|
* stash them to a temporary pending queue and
|
|
* add then after we've restored regulatory
|
|
* settings.
|
|
*/
|
|
spin_lock(®_requests_lock);
|
|
list_splice_tail_init(®_requests_list, &tmp_reg_req_list);
|
|
spin_unlock(®_requests_lock);
|
|
|
|
/* Clear beacon hints */
|
|
spin_lock_bh(®_pending_beacons_lock);
|
|
list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
|
|
list_del(®_beacon->list);
|
|
kfree(reg_beacon);
|
|
}
|
|
spin_unlock_bh(®_pending_beacons_lock);
|
|
|
|
list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
|
|
list_del(®_beacon->list);
|
|
kfree(reg_beacon);
|
|
}
|
|
|
|
/* First restore to the basic regulatory settings */
|
|
world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
|
|
world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
|
|
|
|
list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
|
|
if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
|
|
continue;
|
|
if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
|
|
restore_custom_reg_settings(&rdev->wiphy);
|
|
}
|
|
|
|
if (cached && (!is_an_alpha2(alpha2) ||
|
|
!IS_ERR_OR_NULL(cfg80211_user_regdom))) {
|
|
reset_regdomains(false, cfg80211_world_regdom);
|
|
update_all_wiphy_regulatory(NL80211_REGDOM_SET_BY_CORE);
|
|
print_regdomain(get_cfg80211_regdom());
|
|
nl80211_send_reg_change_event(&core_request_world);
|
|
reg_set_request_processed();
|
|
|
|
if (is_an_alpha2(alpha2) &&
|
|
!regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER)) {
|
|
struct regulatory_request *ureq;
|
|
|
|
spin_lock(®_requests_lock);
|
|
ureq = list_last_entry(®_requests_list,
|
|
struct regulatory_request,
|
|
list);
|
|
list_del(&ureq->list);
|
|
spin_unlock(®_requests_lock);
|
|
|
|
notify_self_managed_wiphys(ureq);
|
|
reg_update_last_request(ureq);
|
|
set_regdom(reg_copy_regd(cfg80211_user_regdom),
|
|
REGD_SOURCE_CACHED);
|
|
}
|
|
} else {
|
|
regulatory_hint_core(world_alpha2);
|
|
|
|
/*
|
|
* This restores the ieee80211_regdom module parameter
|
|
* preference or the last user requested regulatory
|
|
* settings, user regulatory settings takes precedence.
|
|
*/
|
|
if (is_an_alpha2(alpha2))
|
|
regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
|
|
}
|
|
|
|
spin_lock(®_requests_lock);
|
|
list_splice_tail_init(&tmp_reg_req_list, ®_requests_list);
|
|
spin_unlock(®_requests_lock);
|
|
|
|
pr_debug("Kicking the queue\n");
|
|
|
|
schedule_work(®_work);
|
|
}
|
|
|
|
static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag)
|
|
{
|
|
struct cfg80211_registered_device *rdev;
|
|
struct wireless_dev *wdev;
|
|
|
|
list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
|
|
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
|
|
wdev_lock(wdev);
|
|
if (!(wdev->wiphy->regulatory_flags & flag)) {
|
|
wdev_unlock(wdev);
|
|
return false;
|
|
}
|
|
wdev_unlock(wdev);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void regulatory_hint_disconnect(void)
|
|
{
|
|
/* Restore of regulatory settings is not required when wiphy(s)
|
|
* ignore IE from connected access point but clearance of beacon hints
|
|
* is required when wiphy(s) supports beacon hints.
|
|
*/
|
|
if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) {
|
|
struct reg_beacon *reg_beacon, *btmp;
|
|
|
|
if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS))
|
|
return;
|
|
|
|
spin_lock_bh(®_pending_beacons_lock);
|
|
list_for_each_entry_safe(reg_beacon, btmp,
|
|
®_pending_beacons, list) {
|
|
list_del(®_beacon->list);
|
|
kfree(reg_beacon);
|
|
}
|
|
spin_unlock_bh(®_pending_beacons_lock);
|
|
|
|
list_for_each_entry_safe(reg_beacon, btmp,
|
|
®_beacon_list, list) {
|
|
list_del(®_beacon->list);
|
|
kfree(reg_beacon);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
pr_debug("All devices are disconnected, going to restore regulatory settings\n");
|
|
restore_regulatory_settings(false, true);
|
|
}
|
|
|
|
static bool freq_is_chan_12_13_14(u32 freq)
|
|
{
|
|
if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) ||
|
|
freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) ||
|
|
freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
|
|
{
|
|
struct reg_beacon *pending_beacon;
|
|
|
|
list_for_each_entry(pending_beacon, ®_pending_beacons, list)
|
|
if (ieee80211_channel_equal(beacon_chan,
|
|
&pending_beacon->chan))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
int regulatory_hint_found_beacon(struct wiphy *wiphy,
|
|
struct ieee80211_channel *beacon_chan,
|
|
gfp_t gfp)
|
|
{
|
|
struct reg_beacon *reg_beacon;
|
|
bool processing;
|
|
|
|
if (beacon_chan->beacon_found ||
|
|
beacon_chan->flags & IEEE80211_CHAN_RADAR ||
|
|
(beacon_chan->band == NL80211_BAND_2GHZ &&
|
|
!freq_is_chan_12_13_14(beacon_chan->center_freq)))
|
|
return 0;
|
|
|
|
spin_lock_bh(®_pending_beacons_lock);
|
|
processing = pending_reg_beacon(beacon_chan);
|
|
spin_unlock_bh(®_pending_beacons_lock);
|
|
|
|
if (processing)
|
|
return 0;
|
|
|
|
reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
|
|
if (!reg_beacon)
|
|
return -ENOMEM;
|
|
|
|
pr_debug("Found new beacon on frequency: %d.%03d MHz (Ch %d) on %s\n",
|
|
beacon_chan->center_freq, beacon_chan->freq_offset,
|
|
ieee80211_freq_khz_to_channel(
|
|
ieee80211_channel_to_khz(beacon_chan)),
|
|
wiphy_name(wiphy));
|
|
|
|
memcpy(®_beacon->chan, beacon_chan,
|
|
sizeof(struct ieee80211_channel));
|
|
|
|
/*
|
|
* Since we can be called from BH or and non-BH context
|
|
* we must use spin_lock_bh()
|
|
*/
|
|
spin_lock_bh(®_pending_beacons_lock);
|
|
list_add_tail(®_beacon->list, ®_pending_beacons);
|
|
spin_unlock_bh(®_pending_beacons_lock);
|
|
|
|
schedule_work(®_work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void print_rd_rules(const struct ieee80211_regdomain *rd)
|
|
{
|
|
unsigned int i;
|
|
const struct ieee80211_reg_rule *reg_rule = NULL;
|
|
const struct ieee80211_freq_range *freq_range = NULL;
|
|
const struct ieee80211_power_rule *power_rule = NULL;
|
|
char bw[32], cac_time[32];
|
|
|
|
pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
|
|
|
|
for (i = 0; i < rd->n_reg_rules; i++) {
|
|
reg_rule = &rd->reg_rules[i];
|
|
freq_range = ®_rule->freq_range;
|
|
power_rule = ®_rule->power_rule;
|
|
|
|
if (reg_rule->flags & NL80211_RRF_AUTO_BW)
|
|
snprintf(bw, sizeof(bw), "%d KHz, %u KHz AUTO",
|
|
freq_range->max_bandwidth_khz,
|
|
reg_get_max_bandwidth(rd, reg_rule));
|
|
else
|
|
snprintf(bw, sizeof(bw), "%d KHz",
|
|
freq_range->max_bandwidth_khz);
|
|
|
|
if (reg_rule->flags & NL80211_RRF_DFS)
|
|
scnprintf(cac_time, sizeof(cac_time), "%u s",
|
|
reg_rule->dfs_cac_ms/1000);
|
|
else
|
|
scnprintf(cac_time, sizeof(cac_time), "N/A");
|
|
|
|
|
|
/*
|
|
* There may not be documentation for max antenna gain
|
|
* in certain regions
|
|
*/
|
|
if (power_rule->max_antenna_gain)
|
|
pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
|
|
freq_range->start_freq_khz,
|
|
freq_range->end_freq_khz,
|
|
bw,
|
|
power_rule->max_antenna_gain,
|
|
power_rule->max_eirp,
|
|
cac_time);
|
|
else
|
|
pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
|
|
freq_range->start_freq_khz,
|
|
freq_range->end_freq_khz,
|
|
bw,
|
|
power_rule->max_eirp,
|
|
cac_time);
|
|
}
|
|
}
|
|
|
|
bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
|
|
{
|
|
switch (dfs_region) {
|
|
case NL80211_DFS_UNSET:
|
|
case NL80211_DFS_FCC:
|
|
case NL80211_DFS_ETSI:
|
|
case NL80211_DFS_JP:
|
|
return true;
|
|
default:
|
|
pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static void print_regdomain(const struct ieee80211_regdomain *rd)
|
|
{
|
|
struct regulatory_request *lr = get_last_request();
|
|
|
|
if (is_intersected_alpha2(rd->alpha2)) {
|
|
if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
|
|
struct cfg80211_registered_device *rdev;
|
|
rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
|
|
if (rdev) {
|
|
pr_debug("Current regulatory domain updated by AP to: %c%c\n",
|
|
rdev->country_ie_alpha2[0],
|
|
rdev->country_ie_alpha2[1]);
|
|
} else
|
|
pr_debug("Current regulatory domain intersected:\n");
|
|
} else
|
|
pr_debug("Current regulatory domain intersected:\n");
|
|
} else if (is_world_regdom(rd->alpha2)) {
|
|
pr_debug("World regulatory domain updated:\n");
|
|
} else {
|
|
if (is_unknown_alpha2(rd->alpha2))
|
|
pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
|
|
else {
|
|
if (reg_request_cell_base(lr))
|
|
pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
|
|
rd->alpha2[0], rd->alpha2[1]);
|
|
else
|
|
pr_debug("Regulatory domain changed to country: %c%c\n",
|
|
rd->alpha2[0], rd->alpha2[1]);
|
|
}
|
|
}
|
|
|
|
pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
|
|
print_rd_rules(rd);
|
|
}
|
|
|
|
static void print_regdomain_info(const struct ieee80211_regdomain *rd)
|
|
{
|
|
pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
|
|
print_rd_rules(rd);
|
|
}
|
|
|
|
static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
|
|
{
|
|
if (!is_world_regdom(rd->alpha2))
|
|
return -EINVAL;
|
|
update_world_regdomain(rd);
|
|
return 0;
|
|
}
|
|
|
|
static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
|
|
struct regulatory_request *user_request)
|
|
{
|
|
const struct ieee80211_regdomain *intersected_rd = NULL;
|
|
|
|
if (!regdom_changes(rd->alpha2))
|
|
return -EALREADY;
|
|
|
|
if (!is_valid_rd(rd)) {
|
|
pr_err("Invalid regulatory domain detected: %c%c\n",
|
|
rd->alpha2[0], rd->alpha2[1]);
|
|
print_regdomain_info(rd);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!user_request->intersect) {
|
|
reset_regdomains(false, rd);
|
|
return 0;
|
|
}
|
|
|
|
intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
|
|
if (!intersected_rd)
|
|
return -EINVAL;
|
|
|
|
kfree(rd);
|
|
rd = NULL;
|
|
reset_regdomains(false, intersected_rd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
|
|
struct regulatory_request *driver_request)
|
|
{
|
|
const struct ieee80211_regdomain *regd;
|
|
const struct ieee80211_regdomain *intersected_rd = NULL;
|
|
const struct ieee80211_regdomain *tmp;
|
|
struct wiphy *request_wiphy;
|
|
|
|
if (is_world_regdom(rd->alpha2))
|
|
return -EINVAL;
|
|
|
|
if (!regdom_changes(rd->alpha2))
|
|
return -EALREADY;
|
|
|
|
if (!is_valid_rd(rd)) {
|
|
pr_err("Invalid regulatory domain detected: %c%c\n",
|
|
rd->alpha2[0], rd->alpha2[1]);
|
|
print_regdomain_info(rd);
|
|
return -EINVAL;
|
|
}
|
|
|
|
request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
|
|
if (!request_wiphy)
|
|
return -ENODEV;
|
|
|
|
if (!driver_request->intersect) {
|
|
if (request_wiphy->regd)
|
|
return -EALREADY;
|
|
|
|
regd = reg_copy_regd(rd);
|
|
if (IS_ERR(regd))
|
|
return PTR_ERR(regd);
|
|
|
|
rcu_assign_pointer(request_wiphy->regd, regd);
|
|
reset_regdomains(false, rd);
|
|
return 0;
|
|
}
|
|
|
|
intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
|
|
if (!intersected_rd)
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* We can trash what CRDA provided now.
|
|
* However if a driver requested this specific regulatory
|
|
* domain we keep it for its private use
|
|
*/
|
|
tmp = get_wiphy_regdom(request_wiphy);
|
|
rcu_assign_pointer(request_wiphy->regd, rd);
|
|
rcu_free_regdom(tmp);
|
|
|
|
rd = NULL;
|
|
|
|
reset_regdomains(false, intersected_rd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
|
|
struct regulatory_request *country_ie_request)
|
|
{
|
|
struct wiphy *request_wiphy;
|
|
|
|
if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
|
|
!is_unknown_alpha2(rd->alpha2))
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* Lets only bother proceeding on the same alpha2 if the current
|
|
* rd is non static (it means CRDA was present and was used last)
|
|
* and the pending request came in from a country IE
|
|
*/
|
|
|
|
if (!is_valid_rd(rd)) {
|
|
pr_err("Invalid regulatory domain detected: %c%c\n",
|
|
rd->alpha2[0], rd->alpha2[1]);
|
|
print_regdomain_info(rd);
|
|
return -EINVAL;
|
|
}
|
|
|
|
request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
|
|
if (!request_wiphy)
|
|
return -ENODEV;
|
|
|
|
if (country_ie_request->intersect)
|
|
return -EINVAL;
|
|
|
|
reset_regdomains(false, rd);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Use this call to set the current regulatory domain. Conflicts with
|
|
* multiple drivers can be ironed out later. Caller must've already
|
|
* kmalloc'd the rd structure.
|
|
*/
|
|
int set_regdom(const struct ieee80211_regdomain *rd,
|
|
enum ieee80211_regd_source regd_src)
|
|
{
|
|
struct regulatory_request *lr;
|
|
bool user_reset = false;
|
|
int r;
|
|
|
|
if (IS_ERR_OR_NULL(rd))
|
|
return -ENODATA;
|
|
|
|
if (!reg_is_valid_request(rd->alpha2)) {
|
|
kfree(rd);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (regd_src == REGD_SOURCE_CRDA)
|
|
reset_crda_timeouts();
|
|
|
|
lr = get_last_request();
|
|
|
|
/* Note that this doesn't update the wiphys, this is done below */
|
|
switch (lr->initiator) {
|
|
case NL80211_REGDOM_SET_BY_CORE:
|
|
r = reg_set_rd_core(rd);
|
|
break;
|
|
case NL80211_REGDOM_SET_BY_USER:
|
|
cfg80211_save_user_regdom(rd);
|
|
r = reg_set_rd_user(rd, lr);
|
|
user_reset = true;
|
|
break;
|
|
case NL80211_REGDOM_SET_BY_DRIVER:
|
|
r = reg_set_rd_driver(rd, lr);
|
|
break;
|
|
case NL80211_REGDOM_SET_BY_COUNTRY_IE:
|
|
r = reg_set_rd_country_ie(rd, lr);
|
|
break;
|
|
default:
|
|
WARN(1, "invalid initiator %d\n", lr->initiator);
|
|
kfree(rd);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (r) {
|
|
switch (r) {
|
|
case -EALREADY:
|
|
reg_set_request_processed();
|
|
break;
|
|
default:
|
|
/* Back to world regulatory in case of errors */
|
|
restore_regulatory_settings(user_reset, false);
|
|
}
|
|
|
|
kfree(rd);
|
|
return r;
|
|
}
|
|
|
|
/* This would make this whole thing pointless */
|
|
if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
|
|
return -EINVAL;
|
|
|
|
/* update all wiphys now with the new established regulatory domain */
|
|
update_all_wiphy_regulatory(lr->initiator);
|
|
|
|
print_regdomain(get_cfg80211_regdom());
|
|
|
|
nl80211_send_reg_change_event(lr);
|
|
|
|
reg_set_request_processed();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
|
|
struct ieee80211_regdomain *rd)
|
|
{
|
|
const struct ieee80211_regdomain *regd;
|
|
const struct ieee80211_regdomain *prev_regd;
|
|
struct cfg80211_registered_device *rdev;
|
|
|
|
if (WARN_ON(!wiphy || !rd))
|
|
return -EINVAL;
|
|
|
|
if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
|
|
"wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
|
|
return -EPERM;
|
|
|
|
if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) {
|
|
print_regdomain_info(rd);
|
|
return -EINVAL;
|
|
}
|
|
|
|
regd = reg_copy_regd(rd);
|
|
if (IS_ERR(regd))
|
|
return PTR_ERR(regd);
|
|
|
|
rdev = wiphy_to_rdev(wiphy);
|
|
|
|
spin_lock(®_requests_lock);
|
|
prev_regd = rdev->requested_regd;
|
|
rdev->requested_regd = regd;
|
|
spin_unlock(®_requests_lock);
|
|
|
|
kfree(prev_regd);
|
|
return 0;
|
|
}
|
|
|
|
int regulatory_set_wiphy_regd(struct wiphy *wiphy,
|
|
struct ieee80211_regdomain *rd)
|
|
{
|
|
int ret = __regulatory_set_wiphy_regd(wiphy, rd);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
schedule_work(®_work);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(regulatory_set_wiphy_regd);
|
|
|
|
int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy,
|
|
struct ieee80211_regdomain *rd)
|
|
{
|
|
int ret;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
ret = __regulatory_set_wiphy_regd(wiphy, rd);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* process the request immediately */
|
|
reg_process_self_managed_hints();
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl);
|
|
|
|
void wiphy_regulatory_register(struct wiphy *wiphy)
|
|
{
|
|
struct regulatory_request *lr = get_last_request();
|
|
|
|
/* self-managed devices ignore beacon hints and country IE */
|
|
if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
|
|
wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
|
|
REGULATORY_COUNTRY_IE_IGNORE;
|
|
|
|
/*
|
|
* The last request may have been received before this
|
|
* registration call. Call the driver notifier if
|
|
* initiator is USER.
|
|
*/
|
|
if (lr->initiator == NL80211_REGDOM_SET_BY_USER)
|
|
reg_call_notifier(wiphy, lr);
|
|
}
|
|
|
|
if (!reg_dev_ignore_cell_hint(wiphy))
|
|
reg_num_devs_support_basehint++;
|
|
|
|
wiphy_update_regulatory(wiphy, lr->initiator);
|
|
wiphy_all_share_dfs_chan_state(wiphy);
|
|
}
|
|
|
|
void wiphy_regulatory_deregister(struct wiphy *wiphy)
|
|
{
|
|
struct wiphy *request_wiphy = NULL;
|
|
struct regulatory_request *lr;
|
|
|
|
lr = get_last_request();
|
|
|
|
if (!reg_dev_ignore_cell_hint(wiphy))
|
|
reg_num_devs_support_basehint--;
|
|
|
|
rcu_free_regdom(get_wiphy_regdom(wiphy));
|
|
RCU_INIT_POINTER(wiphy->regd, NULL);
|
|
|
|
if (lr)
|
|
request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
|
|
|
|
if (!request_wiphy || request_wiphy != wiphy)
|
|
return;
|
|
|
|
lr->wiphy_idx = WIPHY_IDX_INVALID;
|
|
lr->country_ie_env = ENVIRON_ANY;
|
|
}
|
|
|
|
/*
|
|
* See FCC notices for UNII band definitions
|
|
* 5GHz: https://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii
|
|
* 6GHz: https://www.fcc.gov/document/fcc-proposes-more-spectrum-unlicensed-use-0
|
|
*/
|
|
int cfg80211_get_unii(int freq)
|
|
{
|
|
/* UNII-1 */
|
|
if (freq >= 5150 && freq <= 5250)
|
|
return 0;
|
|
|
|
/* UNII-2A */
|
|
if (freq > 5250 && freq <= 5350)
|
|
return 1;
|
|
|
|
/* UNII-2B */
|
|
if (freq > 5350 && freq <= 5470)
|
|
return 2;
|
|
|
|
/* UNII-2C */
|
|
if (freq > 5470 && freq <= 5725)
|
|
return 3;
|
|
|
|
/* UNII-3 */
|
|
if (freq > 5725 && freq <= 5825)
|
|
return 4;
|
|
|
|
/* UNII-5 */
|
|
if (freq > 5925 && freq <= 6425)
|
|
return 5;
|
|
|
|
/* UNII-6 */
|
|
if (freq > 6425 && freq <= 6525)
|
|
return 6;
|
|
|
|
/* UNII-7 */
|
|
if (freq > 6525 && freq <= 6875)
|
|
return 7;
|
|
|
|
/* UNII-8 */
|
|
if (freq > 6875 && freq <= 7125)
|
|
return 8;
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
bool regulatory_indoor_allowed(void)
|
|
{
|
|
return reg_is_indoor;
|
|
}
|
|
|
|
bool regulatory_pre_cac_allowed(struct wiphy *wiphy)
|
|
{
|
|
const struct ieee80211_regdomain *regd = NULL;
|
|
const struct ieee80211_regdomain *wiphy_regd = NULL;
|
|
bool pre_cac_allowed = false;
|
|
|
|
rcu_read_lock();
|
|
|
|
regd = rcu_dereference(cfg80211_regdomain);
|
|
wiphy_regd = rcu_dereference(wiphy->regd);
|
|
if (!wiphy_regd) {
|
|
if (regd->dfs_region == NL80211_DFS_ETSI)
|
|
pre_cac_allowed = true;
|
|
|
|
rcu_read_unlock();
|
|
|
|
return pre_cac_allowed;
|
|
}
|
|
|
|
if (regd->dfs_region == wiphy_regd->dfs_region &&
|
|
wiphy_regd->dfs_region == NL80211_DFS_ETSI)
|
|
pre_cac_allowed = true;
|
|
|
|
rcu_read_unlock();
|
|
|
|
return pre_cac_allowed;
|
|
}
|
|
EXPORT_SYMBOL(regulatory_pre_cac_allowed);
|
|
|
|
static void cfg80211_check_and_end_cac(struct cfg80211_registered_device *rdev)
|
|
{
|
|
struct wireless_dev *wdev;
|
|
/* If we finished CAC or received radar, we should end any
|
|
* CAC running on the same channels.
|
|
* the check !cfg80211_chandef_dfs_usable contain 2 options:
|
|
* either all channels are available - those the CAC_FINISHED
|
|
* event has effected another wdev state, or there is a channel
|
|
* in unavailable state in wdev chandef - those the RADAR_DETECTED
|
|
* event has effected another wdev state.
|
|
* In both cases we should end the CAC on the wdev.
|
|
*/
|
|
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
|
|
if (wdev->cac_started &&
|
|
!cfg80211_chandef_dfs_usable(&rdev->wiphy, &wdev->chandef))
|
|
rdev_end_cac(rdev, wdev->netdev);
|
|
}
|
|
}
|
|
|
|
void regulatory_propagate_dfs_state(struct wiphy *wiphy,
|
|
struct cfg80211_chan_def *chandef,
|
|
enum nl80211_dfs_state dfs_state,
|
|
enum nl80211_radar_event event)
|
|
{
|
|
struct cfg80211_registered_device *rdev;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (WARN_ON(!cfg80211_chandef_valid(chandef)))
|
|
return;
|
|
|
|
list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
|
|
if (wiphy == &rdev->wiphy)
|
|
continue;
|
|
|
|
if (!reg_dfs_domain_same(wiphy, &rdev->wiphy))
|
|
continue;
|
|
|
|
if (!ieee80211_get_channel(&rdev->wiphy,
|
|
chandef->chan->center_freq))
|
|
continue;
|
|
|
|
cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state);
|
|
|
|
if (event == NL80211_RADAR_DETECTED ||
|
|
event == NL80211_RADAR_CAC_FINISHED) {
|
|
cfg80211_sched_dfs_chan_update(rdev);
|
|
cfg80211_check_and_end_cac(rdev);
|
|
}
|
|
|
|
nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL);
|
|
}
|
|
}
|
|
|
|
static int __init regulatory_init_db(void)
|
|
{
|
|
int err;
|
|
|
|
/*
|
|
* It's possible that - due to other bugs/issues - cfg80211
|
|
* never called regulatory_init() below, or that it failed;
|
|
* in that case, don't try to do any further work here as
|
|
* it's doomed to lead to crashes.
|
|
*/
|
|
if (IS_ERR_OR_NULL(reg_pdev))
|
|
return -EINVAL;
|
|
|
|
err = load_builtin_regdb_keys();
|
|
if (err)
|
|
return err;
|
|
|
|
/* We always try to get an update for the static regdomain */
|
|
err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
|
|
if (err) {
|
|
if (err == -ENOMEM) {
|
|
platform_device_unregister(reg_pdev);
|
|
return err;
|
|
}
|
|
/*
|
|
* N.B. kobject_uevent_env() can fail mainly for when we're out
|
|
* memory which is handled and propagated appropriately above
|
|
* but it can also fail during a netlink_broadcast() or during
|
|
* early boot for call_usermodehelper(). For now treat these
|
|
* errors as non-fatal.
|
|
*/
|
|
pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
|
|
}
|
|
|
|
/*
|
|
* Finally, if the user set the module parameter treat it
|
|
* as a user hint.
|
|
*/
|
|
if (!is_world_regdom(ieee80211_regdom))
|
|
regulatory_hint_user(ieee80211_regdom,
|
|
NL80211_USER_REG_HINT_USER);
|
|
|
|
return 0;
|
|
}
|
|
#ifndef MODULE
|
|
late_initcall(regulatory_init_db);
|
|
#endif
|
|
|
|
int __init regulatory_init(void)
|
|
{
|
|
reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
|
|
if (IS_ERR(reg_pdev))
|
|
return PTR_ERR(reg_pdev);
|
|
|
|
spin_lock_init(®_requests_lock);
|
|
spin_lock_init(®_pending_beacons_lock);
|
|
spin_lock_init(®_indoor_lock);
|
|
|
|
rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
|
|
|
|
user_alpha2[0] = '9';
|
|
user_alpha2[1] = '7';
|
|
|
|
#ifdef MODULE
|
|
return regulatory_init_db();
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
void regulatory_exit(void)
|
|
{
|
|
struct regulatory_request *reg_request, *tmp;
|
|
struct reg_beacon *reg_beacon, *btmp;
|
|
|
|
cancel_work_sync(®_work);
|
|
cancel_crda_timeout_sync();
|
|
cancel_delayed_work_sync(®_check_chans);
|
|
|
|
/* Lock to suppress warnings */
|
|
rtnl_lock();
|
|
reset_regdomains(true, NULL);
|
|
rtnl_unlock();
|
|
|
|
dev_set_uevent_suppress(®_pdev->dev, true);
|
|
|
|
platform_device_unregister(reg_pdev);
|
|
|
|
list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
|
|
list_del(®_beacon->list);
|
|
kfree(reg_beacon);
|
|
}
|
|
|
|
list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
|
|
list_del(®_beacon->list);
|
|
kfree(reg_beacon);
|
|
}
|
|
|
|
list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) {
|
|
list_del(®_request->list);
|
|
kfree(reg_request);
|
|
}
|
|
|
|
if (!IS_ERR_OR_NULL(regdb))
|
|
kfree(regdb);
|
|
if (!IS_ERR_OR_NULL(cfg80211_user_regdom))
|
|
kfree(cfg80211_user_regdom);
|
|
|
|
free_regdb_keyring();
|
|
}
|